Signal (시그널)

Sir... what...

What...

Hang in there, I'll call 119.

The walkie-talkie...

What?

Lee Jae-han...

I heard his... voice.

Lieutenant Park Hae-young. This is Lee Jae-han.

Lieutenant.

Are you listening?

Lieutenant.

That couldn't be.

There's no way Lee Jae-han could be alive.

I checked after I heard the radio transmission.

It was definitely there.

Under the rock stairs.

What are you talking about?

I... I...

I killed Lee Jae-han.

What... what are you...

I killed him

with my own hands.

I regret it so much.

Commander.

If he is still alive...

if Detective Lee Jae-han is alive,

please tell him

that I didn't have a choice.

That I had no choice.

Why...

Why did you...

Everything started

in Inju.

Commander.

Commander, wake up!

Hello? I'm by the Inju Hospital.

Someone's hurt, please hurry!

Commander!

Why were you there? Tell us.

Gosh, say something!

-What happened? -What do you mean he got attacked?

We're still figuring out what happened. We came after we got the report,

and he was with the victim at the scene. He's the sole witness.

You? What did you do to him?

-We're on the same team. -No!

Stop it, we don't even know what really happened.

He has the Commander's blood on his hands. Don't you see?

What is this?

What happened to Ahn?

Can't you hear me? What happened to Ahn Chi-soo?

He...

passed away on the scene.

Why did you go meet Ahn Chi-soo in Inju?

He called me.

He said that he had

something to tell me about the Inju female student case,

which occurred in 1999.

About what?

He said the case was fabricated.

The case was fabricated?

How?

He didn't tell me that.

When I arrived,

he had already been attacked.

Did you see anybody suspicious at the scene?

He was there by himself.

What about the weapon?

I didn't see one.

What about the witness and the state of the surroundings?

-It was too dark... -You're a detective!

Are you saying you didn't see anything at the crime scene of your senior officer?

What about you guys?

Your leader, who's an ace of all aces got killed on the cold concrete floor.

I'm sure you won't be able to rest easy until the killer is caught.

All of you should work on this case.

Look at what Ahn Chi-soo was doing before he died.

Everything from his call records, card records, CCTV footage of the scene,

and bring that killer to me.

But,

the Cold Case Squad will stay out of this case.

-He was our superior, too. -Your teammate is a prime suspect.

Thus, you can't participate in this case.

-It wasn't me. Why would I-- -That's for us to decide.

Start the investigation.

Lieutenant Park Hae-young. Please cooperate with our investigation.

On your last call, you arranged to meet in front of Inju Hospital at 11:00 pm.

-Yes. -Did you tell anybody else this?

No.

Same goes with the Commander.

I checked his phone records, and you were the last person to speak with him.

So the only people who knew about your meeting

were you and the Commander. Just the two of you.

-I didn't do it. -Why did you fight with him?

In the office.

Too bad. I'd love some pork with soju.

Let's grab a drink after the case is solved.

If you ever touch my stuff again, I won't let you off easily.

What did you guys talk about?

Why did you fight with him?

What's this?

He had a child?

He had a daughter?

She must have been sick.

Bone marrow cancer?

Yes, the patient and her guardian must have had a hard time.

She struggled against the disease for a long time.

What about the patient?

He had a daughter,

but she had bone marrow cancer and died three days ago.

He didn't talk about his family, so nobody knew about this.

I don't know what to say.

What else?

We're checking the CCTV footage around the scene.

But there weren't any CCTVs around the place he was killed.

If the suspect deliberately chose that place as a meeting point,

there's a possibility he planned the crime all along.

What about his phone and card records?

I saw something weird when reviewing his phone records on the day he got killed.

How do you know Commander Ahn?

I'm a club owner and former gangster. How do you think I know the Commander?

Answer the question.

He was in charge of a case involving my workers.

And I've been giving him useful information ever since.

You spoke with him at 3:00 pm that day. What did you talk about?

We just talked about life, okay?

Answer properly.

Even if I do, you won't believe me.

How dare you!

It's a turf war between the police.

I'll be the one hurt if I get involved!

What do you mean?

-A detective came to me a few days ago. -Who?

His name was Park Hae-young.

He came to me and inquisitively asked about Commander Ahn.

Like what?

He asked if Ahn Chi-soo got bribed,

or if he fabricated the case. He kept asking those things.

So I told him I don't know.

But he kept persisting and annoying me.

That's why I called the Commander. So I could warn him about his subordinate.

Park Hae-young did a background check on Ahn Chi-soo?

Did you find out why?

No, Park Hae-young is keeping his mouth shut about that matter.

Why did you do a background check on him?

Kim Sung-bum told us everything.

Why did you do a background check on him?

What the hell are you hiding?

Do a thorough search on Park Hae-young.

Check all his past whereabouts,

and find out why he did a background check on Ahn Chi-soo.

Report to me when you find anything.

I heard Commander fought with Hae-young before he died. Is that true?

Where did you hear that?

I heard he had a walkie-talkie with him. Is that true?

Didn't you hear the Director?

Your team is excluded from this case.

Don't ask me anymore.

Did you find a walkie-talkie among the Commander's things?

With a yellow smiley sticker on it.

Let me tell you this one last time. Butt out of this case.

Don't turn off your cell phone, and stay nearby.

Act normally. Okay?

Things aren't good.

The commander raised his daughter by himself since the divorce.

He never talked about his family, so nobody knew.

But his daughter died of bone cancer a few days ago.

The detectives of the Wide-Area Squad are about to explode.

You were with him when he died and didn't even testify properly.

You might take all the blame for this.

It wasn't me.

I know. I trust you.

I don't think you killed the Commander.

That's why I'm asking you,

why did you do a background check on him?

I have to know something to help you.

The bribery case of Detective Lee Jae-han.

Everything was fabricated.

How do you know that?

You did a background check on him, too?

Ahn Chi-soo and the gangster Kim Sung-bum were the ones who framed him.

How do you know that?

How...

That's not important.

The important thing is that the Commander is related to Detective Lee's bribery case

and there's a bigger force within the police behind in this case.

You said you trusted me, right?

I do, too. You're the only person I trust.

You're the only person I can trust in this police organization.

Do you have proof?

Do you have proof that Ahn Chi-soo fabricated the case?

I only thought it in my head until Commander Ahn died.

But it's all certain now.

What are you talking about?

Commander didn't have any choice but to be involved in fabricating the case.

What do you mean?

He told me right before he died.

That he...

killed Detective Lee.

Don't lie to me.

Why...