(Episode 4)
Do you want me to tell you what I did with them?
I used my own hands to slit open their necks.
Dong Wook and Kyung Seok were killed with a gun, not a knife.
They had a mastermind who controlled them from behind.
Is that Baek Mo Sa?
Baek Mo Sa.
You asked me why I didn't contact the NIS after that incident.
I called the number you gave me.
But a group of other people showed up at the rendezvous point.
They had come to kill me.
Do not trust anyone.
Don't ever.
My gosh. You're really tense.
Relax, will you?
Here's what you asked me to look into.
(Personnel File)
Shin Sang Hoon is with General Affairs.
He served with the UDU, the Navy Intelligence Unit,
and was a special hire.
Why is he with General Affairs now?
The project he was hired for got called off.
Now that they had no use for him,
no one wanted him on their team, so he ended up there.
Is there anything else?
There was one interesting fact.
Do you know who was in charge of the project he was hired for?
Chief Ha Dong Kyun.
I think there's a connection between the two,
but however hard I look, I can't find anything else.
And what's going on with Chief Ha?
What were you to scheming?
Did you really...
forget everything from the past year?
Do me another favor.
What is it?
Check the operating room server.
Last year in mid-March,
there was an incoming emergency call from Dandong.
Find out who the last person to receive the report on it was.
That's not hard at all.
It's urgent. Make it quick.
I will. I'll call you as soon as I find out.
I said it's urgent.
I thought we could eat together.
(The Late Choi Il Lak)
(NFS)
(One year ago)
(Forensics)
Search thoroughly.
Take your time and circle.
Keep going.
Bring it further this way.
(My son)
Sang Kyun.
You look worse than before.
Do you eat regularly?
- Yes. - I was at your place last week.
You didn't let me in when you were at home, right?
You can stop this now.
It makes me feel uncomfortable.
I have something for you.
I have enough money.
I was compensated for Dad's death.
Sang Kyun. I want you to...
Don't you think so too?
That my dad killed himself.
That's...
not something you can decide on so easily.
I'm still looking into it.
So if you wait a little longer...
Last night, I dreamed of him again.
He stood by my bed...
and looked down at me silently, then walked away.
I tried to call out to him, but I couldn't make a sound.
Even in my dream, I couldn't do a thing.
Do you know...
how that feels like?
I do know...
how that feels.
How would you know?
You haven't been through it.
Sang Kyun. I'm...
I shouldn't have believed you at all.
It has been a year and nothing has changed.
What will you do about my poor dad?
I can't leave him like this anymore. Now...
I will do something about it.
Sang Kyun.
Oh, I forgot.
(NIS)
What's this?
It's an agent's laptop assigned to Technical Development.
It's connected to the network,
but there's no movement yet.
Track the IP address.
Check the operating room server.
Last year in mid-March, there was...
an incoming emergency call from Dandong.
Find out who the last person to receive the report on it was.
Gosh, he's impatient.
I'm checking right now.
Wait while I get what you need.
What's this? This can't be.
What is it? What's wrong?
There's no record of it.
What?
I think it's a cafe on Sillim Junction.
Move.
It's the back door. He's in the system already.
Files are leaving the main server.
Lock it. Close down the server.
What's going on?
What do you mean there's no record?
It doesn't say who took the call.
The data was deleted.
Just the call you talked about.
Shoot, I think something's wrong.
I'll call you back.
How could someone get through our firewall so easily?
Well...
(List of Hacks and Confirmed Loss)
The person came in through a back door they'd planted.
There was nothing we could do.
- A "back door"? - Yes.
To put it simply, someone created a back door in advance...
to gain easier access to our server.
Are you saying an insider was involved?
Yes.
They used an agent's laptop that was approved by the agency.
It's clear an insider was involved.
Then you just have to find out whose laptop was used.
We're looking into that right now and will get the result shortly.
What files were leaked?
We need to check to get the details,
but they targeted top-secret intel...
assigned one year ago.
The hacker had complete knowledge of our server directory,
(List of Hacks and Confirmed Loss)
Excuse me.
Yes, what is it?
Okay, I got it.
What is it?
We found out who's laptop it is.
Whose is it?
Well, it's...
Director Choi Il Lak's.
Who's that?
Who is it?
He worked at Technical Development.
He was in charge of the MPK program.
How can a specific part be erased?
Someone got in the operating room and erased the record.
That's the only way.
Can you find out who?
I tried to find out.
But our server went down since yesterday's hacking incident.
- Hacking incident? - You haven't heard?
Someone hacked into our main server yesterday.
I heard only top-secret intel from a year ago was taken.
Was any of it...
from Foreign Intelligence...
gathered while I was missing a year ago included?
I don't know.
Anyway, everyone's under inspection because of the incident.
We should lay low and don't contact each other for a while.
I'm getting another call. I should get going.
You do know Director Choi Il Lak, right?
What? You worked with him before, didn't you?
Yes, ma'am. But why do you ask?
They found out the laptop used to hack our server was his.
And the hacker targeted the intel from a year ago.
Do you know what this means?
Do you think that's what the hacker wanted?
I'm sure the hacker wanted the file for the civilian inspection case.
In order to cover that up,
we had to pay a great price.
If Deputy Commissioner Do gets the information,
you do know what will happen, right?
No need to worry.
We will fully mobilize information from branches all over the country.
But it's not like...
we're the only one who's being chased.
I'm sure she's being torn by anxiety too.
What do you mean?
Do you think it only includes data that'll be used against us?
The civilian inspection case is the Achilles' heel...
of Domestic Intelligence.
If we can secure the data, we can take the initiative.
The situation isn't exactly going in our favor.
If things go wrong, it could backfire.
The leaked intel includes...
the information we can never let them have.
It'll end only when one of us fails.
That means we have to secure the intel first...
no matter what.
So I was thinking...
perhaps you won't have to step up to the plate for this.
I don't understand.
You can work behind the scenes to support us.
Then who's going to be in charge?
Someone who's not related...
to the civilian inspection case.
That way, if things go wrong,
we can get rid of the person in charge without any trouble.
Do we even have anyone for the job?
Come in.
Did you want to see me?
Yes, I did.
Someone got in the operating room and erased the record.
Can I get an extension number?
Who are you looking for?
I'll find the number for you.
Director Choi Il Lak at Technical Development.
What is it?
Do you know...
Director Choi?
Why? What's going on?
Did something happen to him?
Director Choi...
died...
a year ago.
Director Choi...
committed suicide.
Ms. Yoo Je Yi?
Yes, that's me.
We're from the inspection office.
Please come with us.
Me?
Were you aware that Choi Sang Kyun has been engaging in...
hacking activities?
Tell us everything you know.
(NIS employee Mr. Choi's suicide note was released.)
("I'm sorry. There was no civilian inspection.")
"(In his suicide note, Mr. Choi denied claims...)
(that NIS had planned an inspection against civilians.)"
Sir.
Technical Development came up with a hacking program called MPK.
A press release said the NIS used the program to investigate civilians,
and it had stirred up controversy.
He wasn't taking any sleeping pills.
But he got a high dose of sleeping pills without a prescription.
So many things seem fishy.
How do you know so much about the case?
I was pretty close to Director Choi.
He was my mentor when I first got the job.
How do you know Director Choi?
We worked on the same project a few years ago.
Sir.
I think Sang Kyun had something to do with the incident.
Help me find Sang Kyun.
It's been a while, but he was your colleague.
Someone hacked into our main server yesterday.
I heard only top-secret intel from a year ago was hacked.
Thank you, reporter.
I'll see you there tomorrow.
(Reporter Jang Ho Sung)
(Unknown Caller Would you like to work with me?)
(Who are you?)
(Someone like you.)
(Someone who wants revenge.)
(Do you want true vengeance?)
(Slide to shutdown)
(Do you have it with you?)
- What are you doing? Get in. - Yes, sir.
Sang Kyun.
Sang Kyun, it's me.
I don't think he's home.
I heard he had some trouble adjusting to school.
So Director Choi homeschooled him.
That's when he learned coding and programming.
Come to think of it, he seemed gifted that way.
He was on a famous hacking team in middle school.
Everyone said he was a genius.
Try to find something that could give us a clue.
Yes, sir.
(Daekook Ilbo Reporter Jang Ho Sung)
(Reporter Jang Ho Sung)
Sir.
(Daekook Ilbo Reporter Jang Ho Sung)
It's the reporter Sang Kyun is following on SNS.
(Reporter Jang Ho Sung)
I know what he's trying to do.
He wants to give the intel to the press.
(Reporter Jang Ho Sung)
You must be Sang Kyun.
Did you bring the data we talked about on the phone?
Is that...
what you want to know?
I wanted to talk about my father's incident first.
Okay.
Let's do that.
Then what should we talk about first?
Sang Kyun!
Hey! Sang Kyun! Stop right there!
Stop.
Darn it.
Choi Sang Kyun!
Hey, Sang Kyun.
(Han Ji Hyuk)
Yes. I'm on my way out.
No. Don't. Another team just got here.
They just entered through the front door.
Let's meet up in the basement parking lot.
Hurry!
What's wrong? What is it?
You're Han Ji Hyuk, right?
Do you know me?
How do you know my name?
Don't you remember?
What you promised me that day?
What I promised? What did I promise you?
- I made a promise to you? - Yes.
You said so yourself...
about a year ago in Shenyang.
Liar.
You promised to protect my father.
(Please find out who got the last call from my team.)
You'll wish you didn't lose him when I'm done with you!
Don't you remember?
What you promised me that day?
You said so yourself...
about a year ago in Shenyang.
What's your deal?
Why did you get involved and mess up this operation?
Have you forgotten already?
The pain you caused to people around you?
It was all because of you.
If Director Choi's legs weren't injured like that,
he wouldn't have ended up in Technical Development.
And if he never ended up there, this would have never happened.
When you heard it was his son,
did you suddenly get a sense of sympathy for the kid?
Are you trying to feel less guilty about what you did now?
Then what is your deal?
I doubt that you're doing this out of sympathy.
Why are you running an operation just to catch a kid?
You can't answer that?
Are you just following orders?
Shut your mouth. Why do you think I'm in this...
Let me remind you.
You'd better stay out of this.
Next time, I won't be so nice to let you off with a warning.
So there was an incident at a shopping mall in Yeouido.
Tell me how it happened.
Why must I explain that to you?
Well, the shopping mall...
was the location we set up in advance.
And your team got involved rather aggressively.
When did we ever set a rule for who goes first?
Come on, Ms. Do.
I talked to the people from the shopping mall.
They suspect that someone hacked in through the internal network...
and shut down...
the power transmission system.
It's obvious you had your hand in it. Who else if not you?
You don't know what you're talking about.
We were just about to catch the culprit.
Because of the blackout, we lost him.
I just assumed that you had something to do with it.
I guess I was wrong.
Before that, Han Ji Hyuk attacked my guys first.
And he helped the culprit get away. Why did you leave that out?
I heard that he's not fully cleared for duty yet.
How could you bring in someone unstable like him?
It looks like you're getting impatient, Deputy Commissioner Do.
I heard that you've been gathering support from other branches.
You're the one who's feeling impatient, Deputy Commissioner Lee.
You won't be able to get away with it this time...
like a year ago.
All right. That's enough.
Anyway, I don't think this will help us resolve this matter.
One of you should take over the case exclusively.
So I gave it some thought.
Deputy Commissioner Lee, you'll take care of this case.
Sir.
Given the nature of the incident,
it'd be better if Domestic Intelligence takes care of this matter.
Is there anything else we need to discuss?
No.
Put everyone available in our team on this case.
Don't forget. This just turned into a race against time.
Yes, ma'am.
And what's up with Han Ji Hyuk?
Why did he get involved like that?
It must be his relationship with Director Choi back in the day.
Hey, Chief Ha.
You know that he wouldn't do something out of a friendship.
Did something happen in Syria?
No. Nothing out of the ordinary.
But you should continue to keep an eye on him just in case.
Yes, ma'am.
(Han Ji Hyuk)
I heard from Director Kang.
You got us the intel for the drug case with the Chinese gang.
I thought about treating you to a meal.
Please get to the point.
Sure.
It's about Director Choi's son.
Why are you chasing him?
Is it because of what happened in the past?
(Syria, four years ago)
You punk. Have you lost your mind?
What's this?
The data that shows how you've been stealing money from our budget.
You've been digging up dirt on me?
So what?
Don't come...
anywhere near the field from now on.
Are you still hung up on that?
Did you call me here to find out if I am?
If you called me here about what happened then, don't worry.
I already decided to bury it.
The fact that you sound so categorical makes me more nervous.
I'll get going then.
Aren't you curious about Su Yeon?
About how she ended up in Domestic Intelligence?
She...
applied for a transfer to go there.
But what's more interesting is...
when she applied for that transfer.
It was exactly two days...
before you disappeared in Dandong a year ago.
I'm just saying.
I thought you should know.
Did you really fail to receive any contact from us?
The only thing you can say to me...
in this situation...
is that?
That's why I'm telling you to bring back results!
We froze all of Choi Sang Kyun's cards and assets you ordered.
We have men watching all the people that he has been in contact with.
Do you know Yoo Je Yi from the field support team?
I'm talking about Han Ji Hyuk's partner.
Install the MPK program on her cellphone.
Pardon?
That's a bit...
Listen here, Mr. Kim.
If it's about responsibility,
I'll take full responsibility for it,
so go and do what I said.
- Yes, ma'am. - Go.
There's nothing wrong with it.
Thank you. Have a nice day.
(The Aslan's Castle is back.)
(A Special Gift Delivery Event)
(The Aslan's Castle is back.)
Take a look at this.
It's a spam email that I just got.
This game...
is an online game that Sang Kyun and I used to play often.
So?
I thought the timing was weird, so I looked into it.
The IP address where it was sent from is from Lithuania, not Korea.
It's a method that...
hackers use to avoid their IP addresses from getting traced.
They use a proxy server from a different country to send it.
So you think that Sang Kyun sent this to you?
Yes. When we used to play this game,
we would talk through the chat in the game.
So Sang Kyun sent you a message?
I think talking to him here or at home is dangerous,
so I'm going to log in at an Internet cafe.
Okay. Do that.
Go ahead first. I'm going to stop somewhere and meet up with you.
I'm sorry.
I should've gotten a drink with you sooner.
It seems you had a lot to drink. That's enough.
I'm fine.
How is it working with Chief Ha?
Everything is okay for now.
For some strange reason, I can't hate him completely.
He's desperate about everything he does.
Did you hear...
how Chief Ha's daughter passed away while you were gone?
Remember how she was hospitalized because she was sick?
I heard about it during the funeral,
but it was a rare disease that I had never heard of.
Because of all of the hospital bills,
he got involved with future investments.
Then he ended up losing everything he had.
Even if he seems okay, I'm sure he's dying on the inside.
Ji Hyuk.
Yes?
I contemplated a lot while I was coming here.
I wasn't sure if I should say this to you.
About...
the incident in Shenyang.
I think Deputy Commissioner Do is hiding something.
Before your team was sent in,
Director Kim Dong Hwan and the other two agents who died in China...
were on a covert mission ordered by Deputy Commissioner Do.
Right until they died.
It seems like she doesn't trust me either.
She sealed all the records as top secret.
You can't even open it without receiving separate authorization.
But it seems like...
it was leaked during the most recent hacking incident.
Are you sure?
I verified through someone in that department.
Plus, Domestic Intelligence...
is throwing a fit because of the civilian inspection case...
was leaked.
Whether you like it or not,
Domestic and Foreign Intelligence...
are the two axes that support our organization.
But...
if one side ends up with their hands on the other side's fatal weakness,
what do you think will happen?
That's why I want to say...
Was Director Choi's son's name...
Sang Kyun?
Yes.
If you find him first,
let's try to ensure that a neutral team...
can collect the leaked information...
so that no one side can get their hands on it.
Is there a team like that in our organization?
I'll look for a way.
(Earth View: Sang Kyun.)
(Earth View: Sang Kyun, are you there? It's me, Je Yi.)
Hello?
Did you get anything?
Not yet.
I think I'm going to have to stay up all night.
I'm wondering if I was wrong too.
The only person that Sang Kyun can trust right now is you.
It breaks my heart when I think about it.
I wonder...
where he is and what he's doing right now.
What he's thinking about.
He was always a lonely kid...
who had nobody but Director Choi.
I'm sure he's going to contact you again. Just wait.
(Earth View: Sang Kyun, are you there? It's me, Je Yi.)
(Perses has logged in.)
(Perses: Je Yi, are you there?)
(Earth View: Yes, I am. Where are you?)
Please come with me.
It must sound like a request because I'm being nice.
Your behavior...
is a serious breach of internal regulations.
No.
You're the one who is abusing your power.
Abusing my power?
How could you wiretap an employee?
Are you seriously unaware of...
why Director Choi ended up like that and why all of this has happened?
Even still,
nothing will change.
There's only one choice that has been given to you.
Then do whatever you want.
You've already listened to our conversation.
I need you...
to go and meet him yourself.
It's not me.
I told you already.
You don't have a choice.
That's not what I mean.
It should be Ji Hyuk who meets him.
Do you think this is a game?
It's not me who Sang Kyun wants to meet.
It's Ji Hyuk.
If you don't believe me, shall I show you our chat log?
(Seoul Station)
I'm sorry for messing things up.
I should've been more cautious.
It's fine. Now focus.
Okay.
Why do you think Sang Kyun asked to see you?
In a crowded place like this too.
I don't know either. That'll be the first thing I ask.
Do you think he'll show up?
After what happened last time.
He will show up.
He's in desperate need of answers himself.
Even so, I doubt it'll be easy to get out of here.
What should we do?
We're just minutes away. Keep your wits about you.
I'll say this again.
Without my permission, you are not to move.
Sir, it's almost time.
(Arrivals)
Is there anything unusual?
No, not yet.
What is it?
Six minutes have passed.
Do you think he caught on?
What's this? Who moved the camera?
It's not us.
Shoot.
(Arrivals)
(Perses)
Sir.
Over there.
Perses.
It's Sang Kyun's gaming ID.
(Perses)
(Airport Express 14:12)
Sir.
Ma'am, T1 and T2 are on the move.
Go after them!
(Subway Platform)
(Seoul Station)
We meet again.
Choi Sang Kyun.
You said I didn't keep a promise. What did you mean by that?
Have we met before?
No.
Then why did you say that?
You asked to see me.
The laptop.
I saw it on Dad's laptop.
A few days before he died,
you and he talked online.
I saw that.
We talked online?
I talked online with your dad?
Can I see it?
I was in an accident a year ago...
that caused some issues with my memory.
I'm saying I lost my memory from the past year...
including chatting to your dad online.
It was a private conversation between me and Il Lak, right?
Then I think it's okay for me to know what we said.
About a week before my dad died,
you contacted him urgently...
saying you were in Shenyang.
- And? - And you asked for a favor.
What was that?
You said someone from Dandong urgently contacted the NIS.
You asked him to find out who answered the call.
Who was it?
That's where the conversation ended.
Not long after that,
my dad died.
Now it's my turn.
Why didn't you help my dad?
He was in need of help.
Did you just use him too?
It's the last word you exchanged in the conversation.
I looked everywhere and couldn't find out what it meant.
What is this?
Sang Kyun.
You hear me, don't you?
I'm a colleague of your dad's.
Someone will be waiting for you at the next station.
Get off and turn yourself in.
If you do that, I'll make sure...
you get a lesser charge.
The man standing before you...
is the man who broke your dad's leg.
You must not trust him.
If you don't believe me,
ask him yourself.
Is it true?
It's not, is it?
No, right?
Do not trust him...
and get off at the next station.
Only then...
can you live.
Choi Sang Kyun!
Do Jin Sook will try to do something.
Lock the IT Office down...
and obtain what's on the laptop.
Start with Foreign Intelligence.
Yes, sir.
(NIS)
- Come on. - Let us in.
- Let's go inside. - Not now.
(IT Office)
What do you mean you couldn't even get in?
Chief Ha, listen carefully.
Get in there now...
and stop Domestic Intelligence from taking the intel.
Do you understand?
I don't care what it takes! Get in there!
What is it?
I'd like to question Choi Sang Kyun.
Don't you see the current situation?
I can sort it out. Let me see him.
Did you really do it alone?
You manage to sneak in a personal back door.
Where did you learn that from?
Sang Kyun.
I used to know your late father.
I'll say this out of concern for you.
You're sorely mistaken if you think...
you'll get a lighter sentence because you're a minor.
If we really get down to it,
we can dump over ten charges on you.
I compared it to the list on our database.
I don't see any problems.
They're mostly still there.
Open the log records...
and see if they left via any networks or devices.
- Okay. - How long will this take?
Our boss is hounding us.
We'll have to clear it by security, so it'll take a few hours.
Mr. Jang, didn't you hear him say the boss is waiting?
- Patch into it directly. - Won't that be too risky?
- Get up. I'll do it. - Okay.
What is this?
So you didn't even touch the files you stole from us.
Then why did you hack into our server, to begin with?
Or did you have an ulterior motive?
You are...
smarter than I thought.
What?
You.
You punk.
Do you have a watch?
What time is it now?
Your watch is...
accurate, right?
This is already spreading into the server rapidly.
I think this is a root key.
- I got nothing to say to you now. - What?
I want to talk to someone else.
Someone with more power than you.
You brat. You're unbelievable.
Did you even hear what I said?
I'm about to bring down your agency.
And every file you have.
What should we do? I think we lost our entire server.
Every single file on our server is hacked to be destroyed.
Why don't we force to restart?
No. Every time we restart the server,
the virus will duplicate itself.
Perhaps, this could've been his plan all along.
What? This was his plan?
He wanted us to activate the virus internally.
So he planted it in his laptop in advance.
- Call them now. - Okay.
What happened?
I think it was a trap.
When the clock hits 8 p.m.,
every file on the server will be ordered to be destroyed.
How can we deactivate that?
You must have added some kind of password.
Do you think I'll just hand over the password?
To you people who killed my father?
Hey, Sang Kyun. Don't do this. Why don't you calm down?
You killed my dad to cover up your dirty laundry.
Hey, Sang Kyun. I don't know why you came to that conclusion.
But that's not true. Okay?
It's not too late to stop this.
Stop this. Okay?
Hey, this won't resolve anything.
Resolve?
Do you think that's what I want to do right now?
I don't care if this gets resolved or not.
I want to destroy you.
I'm sick of watching how you people twist the truth...
and turn it into lies.
You work for the country?
Don't fool yourselves.
All of you just watched my dad die!
You're all monsters.
Watch me...
how I destroy you.
Why don't we force him?
I'll call specialists for this.
No, sir. He's only a kid.
What?
Are you serious? How can you say that right now?
- I'm sorry. - That's fine.
We're pressed for time.
- Can he hear me from inside? - Yes.
I'm Deputy Commissioner Lee In Hwan. I heard what you said.
So tell me what you want.
Then I'll see if I can give you what you want or not.
Not him.
Get me Han Ji Hyuk.
Sir, he's trying to stall time.
We can't let him call the shots.
Sir, it's me.
We don't have time. You need to make a decision now.
You know that you are fully responsible for this. Right?
What's your point?
As he requested, let him talk to Han Ji Hyuk and get this resolved.
That's the best option we have.
If you comply with this,
I won't raise any problems regarding this incident.
Sir.
Please decide.
Fine. Let's do that.
We can't have a normal conversation in the interrogation room...
where everyone is watching.
Allow me to talk to him in a different room privately.
Hey, how dare you make demands?
But I promise you that I will fix this.
Go ahead.
But you'd better...
deliver on what you promised.
It's safe here. We can talk here.
Why did you ask to see me again?
I never...
got your answer.
What does the last word you exchanged with my dad mean?
A few years ago, we were trying to arrest...
an arms dealer who was selling North Korean weapons to Syria.
So we put together a team.
Back then,
Director Choi was on the team as an expert for wiretapping.
But there was a problem.
What's this?
The data that shows how you've been stealing money from our budget.
One of our team members pocketed money we had to use to buy intel.
So we lost a chance to buy an important piece of intelligence.
You punk. Get up.
I'm the one who makes decisions. I'm in charge, not you!
Please stop it.
We don't have time to fight right now.
Mr. Choi.
May I suggest a plan?
There's no problem.
A boy from the militia the insurgent army set us up with...
volunteered to install the wiretapping device...
because since he was young, he wouldn't raise any suspicions.
But the plan failed.
The organization we were after found out about our plan.
- Clear. - All clear.
He was skinned and tortured painfully.
But he didn't say anything about us.
Even when he drew his last breath.
Before we put him on the mission, I asked him a question.
Why are you willing to go this far?
His answer was simple.
It was because they were his and our enemies.
Director Choi argued that we should get even.
I can't leave like this.
You all saw how he died.
If we pull out now,
his death would have been pointless.
I should've stood on my ground.
But I let him talk me into it.
And that's how...
the incident happened.
Back then, I couldn't understand why he was willing to go that far.
But I get it now.
What do you mean?
The dead boy from the militia in Syria.
He was about your age.
He must have seen you...
through that boy.
The files are going to get deleted at any minute.
Call them. And tell them to hurry!
Okay.
So you don't think your father committed suicide.
So what?
Do you think I'm delusional too?
No. I agree with you.
I lost all of my colleagues a year ago...
because of a traitor in our organization.
The person I asked Director Choi to find...
was that traitor.
Are you saying...
that my dad died because of that person?
That person even tried to kill the informant...
that made the emergency call from Dandong.
If they knew that Director Choi was going after them,
they would've tried to get rid of him.
No way.
You asked what the last word in our last conversation...
on the messenger meant.
It's the last thing that the Syrian child from the militia...
said to us.
What does it mean?
"Mutual enemy."
Listen carefully.
The person you have to seek revenge on isn't this organization.
It's the rat that's hiding among us.
So...
let me handle the revenge you were planning.
You and I are going after the same enemy.
Did you say...
that word meant "mutual enemy"?
Tell them.
That's the code...
to stop the delete order.
Hang in until the end.
I'm going to find the culprit and make them pay.
Are you okay?
Okay.
They stopped the delete order.
Are you going home now? Good job today.
What does it mean?
"Mutual enemy."
The person you have to seek revenge on isn't this organization.
It's the rat that's hiding among us.
So...
let me handle the revenge you were planning.
Did you hear...
how Chief Ha's daughter passed away while you were gone?
Because of all of the hospital bills,
he got involved with future investments.
Then he ended up losing everything he had.
Are you going home now? Good job today.
Don't worry too much.
Luckily, nothing big happened,
so your punishment won't be that heavy.
I heard from the security team...
that the root key you used...
was a malignant code they've never seen before.
Where did you get it?
That's not your area of expertise.
Did you really plan this entire thing yourself?
Was there another person who helped you?
(Someone who wants revenge.)
(Do you want true vengeance?)
No, there wasn't.
Okay. Do you need anything?
(Phone)
Is it important?
(National Intelligence Service Korea)
(Seo Su Yeon)
Do you want something to drink?
No, it's fine. Did something happen?
No, nothing happened.
I just...
thought I should sit down and have a conversation with you.
Hold on.
Yes.
No. I'll give it to them.
Okay.
Sorry.
Can you wait here? It'll only take a minute.
There's this resort right by the beach there,
and the view of the sunset from the terrace...
is amazing.
What is it?
Hello? It's me, Choi Sang Kyun.
I'm calling you in secret,
so I'll get straight to it.
My dad always told me to hold onto my final card until the end.
That's why I thought about it for a long time.
Hello? Are you listening?
Go ahead. I'm listening.
To be honest,
my dad said he found that person on the messenger.
The last person to get contacted during the emergency in Dandong.
That person's name is...
Seo...
Su Yeon.
That's what it said.
(The Veil)
There are some serious rumors going around about Seo Su Yeon.
How did Su Yeon end up like that?
Why is this person here?
Don't mention this person's name to anyone.
- Who did it? Tell me! - Han Ji Hyuk!
You've already reached your limit.
You're like a time bomb that's waiting to explode!
Ji Hyuk. The basement garage. Hurry!
It's been a while.
Shut your mouth!
You should stop doing what you were planning.
You can't catch them just because you know who they are.
Who told you to tell me this?