Professor, I heard you were going on a vacation.
It was a sudden change of mind.
I'm sorry about what happened. You really need to get some rest.
By the way, where are you going?
I don't know yet.
That makes me...
a serial killer.
I visited the tunnel
after a long time.
I found peace after 30 long years.
I thought no one knew who I was.
Keeping a secret...
was so exciting, that it made me laugh.
I never thought he would follow me all the way there.
-Thank you. -Bye, Officer Park.
Ma'am.
What is it?
Did you know that there was a tunnel in this neighborhood?
-A tunnel? -Yes.
I've been working here for three years, and yet I didn't know.
It looks really old.
I know that tunnel. It is old.
A woman was murdered there.
-What? -It's been over 30 years.
I went to school with her.
I feel so sorry for her.
Why do you ask?
It's always people talking about and remembering
others' deaths, that cause problems for me.
This is why...
I told you to leave me be.
Until then,
I just thought my peace was broken.
However, I realized today,
that everything that happened,
was destined for me.
You're new. Shouldn't you introduce yourself?
I'm Sergeant Park Gwang-ho. No.
-I'm Senior Patrol Officer, Park Gwang-ho. -I'm Mok Jin-u.
Actually, my mother was a victim of a serial killer 30 years ago.
How could that have happened?
I thought it was a relief that I came to know
Officer Park is my father, even though it's a little late.
Destiny brought the three of them to me.
Yeon-ho.
Yeon-ho! Yeon-ho!
Yeon-ho!
What do you mean by that?
Professor Shin has gone missing?
She told me she'd come to the police station.
She...
She told me...
Her cellphone was on the ground.
We don't really know what happened.
She said she'd arrive soon.
Seon-jae...
She'd never drop and leave her things on the ground.
All right, I get what you are saying.
Let's check the CCTV first.
Wait. Go back to this part.
That scum.
I'll kill him.
What about the other CCTV? Can't we check where his car went?
Wait a moment.
Let's go.
But Gwang-ho...
Professor Shin isn't there.
-No way. -It can't be.
That scum.
She hasn't gone missing. She has been kidnapped.
Put out an all-points bulletin for the car,
and trace his phone's location.
What happened to the search warrant?
What? You need to get it, no matter what!
Goodness.
-Did you get anything? -He must have drugged her.
What is going on?
What would happen to Gwang-ho if something has happened to her?
-Chief. -Yes?
According to the assistant, she left the office at 7:27 p.m.
The last phone call she made to Gwang-ho was at 7:35 p.m.
The CCTV recording of his car at the main gate was at 7:42 p.m.
That scum.
It's been over an hour.
-Any witnesses? -None. And that's the only CCTV.
What about Gwang-ho and Seon-jae?
They went to the control center to track the movements of his car.
It's a race against time. We need to hurry.
-Yes, sir. -Yes, sir.
Next.
No, the next one.
Next.
Stop there.
8:40 P.M.
He left through the Hwayang Tollgate 40 minutes ago.
The car stopped here.
-The car stopped? -Yes.
But after kidnapping her,
he went straight to the Hwayang Tollgate from the parking lot.
According to the recorded time,
it took 20 minutes, meaning he didn't stop.
That means he has a destination.
He's right. He won't be carrying her in his car everywhere.
He'd be exposed easily.
The fact that the tracks stopped at the tollgate...
He might have used a national highway to hide his destination.
Then our first priority is to figure out his destination.
We should watch all the CCTVs of every national highway as well.
We also need to step up the inspection.
All right.
HWAYANG UNIVERSITY PARKING LOT
Chief, why don't we start an open investigation?
No. If it's exposed in the media, everything we do will be exposed.
Nobody knows what he will do to Professor Shin.
Where on earth is the fountain pen?
It's only Professor Shin who knows it.
We should find her first.
Mok Jin-u was born in Seoul.
It's been long since his grandmother's house was gone.
Is there any real estate under his name?
There is one he's living in.
I couldn't find any clue there.
Let's go to his previous houses.
He must have gone to a place he's familiar with.
We should investigate areas he provided voluntary medical services.
Most of them are islands,
and there are many empty houses, which are good to hide in.
Chief, Gwang-ho and I are going to find his destination first.
Okay. Go ahead.
Tae-hui and Min-ha, investigate his call history,
bank statement, credit card details,
and the internet search history.
I'll check the CCTVs of the national roads.
The top priority is to catch up with him.
Come on. Let's go.
It's done.
-Thank you. -Okay.
Sir, is there any other problem in the trunk?
No. What's wrong?
I heard some sound from it.
Hello.
Yes, sir.
I'll be there shortly, sir.
Could you tell me again where you are exactly?
Okay, I see.
I'm sorry. Drive safely, sir.
Thank you.
MOK JIN-U PERSONNEL FILE
33 SHINHYEON-DONG, HWAYANG, GYEONGGI-DO, NO CLUE, NO CHANCE
VOLUNTEER MEDICAL SERVICE DAILY LOG
VOLUNTEER MEDICAL SERVICE
VOLUNTEER MEDICAL SERVICE 2
BANK STATEMENTS
CALL HISTORY
His call history of a month
shows that he called only his family and his office.
There's not a single unusual record.
He hardly used his credit cards.
He's beyond Jung Ho-yeong.
-If he'd used them, we could... -Seriously?
A witness showed up.
You mean that customer?
There was a nail stuck in the wheel. I patched it up.
Where was it?
It was 43 National Highway in Yeongyeong.
Is it 43 national highway in Yeongyeong?
He's never lived in Yeongyeong.
Here it is.
He provided voluntary medical service in Yeongyeong.
What?
Is there anything else to say about him?
Didn't you see a woman?
No, there wasn't a woman. He was alone.
Oh, right. There was some sound coming out of the trunk.
What?
What is this? Gosh.
-Is this it? -There doesn't seem to be a CCTV.
Come here!
It can't be a place we can easily find.
Mok Jin-u took her to a place only he knows.
Where on earth is that?
I'll ask where the fountain pen is...
three times only.
If you don't answer the question...
you will be dead.
You'll be given only three chances.
Remember that.
Here goes the first one.
Where is the fountain pen?
You still have two chances left.
This is the second time...
and third time.
Where is the fountain pen?
Where on earth is it?
Are you going to answer it?
England.
It's in England.
What?
Do you expect me to believe that?
You know I was adopted.
Everything from my childhood is in England.
I just need to call.
You will pay for it...
if you're trying to fool me.
Answer me carefully.
Is it really in England?
INTERNATIONAL CALL
Send it to the university.
How long will it take?
It could arrive within...
As early as three days.
Three days.
What should we do in the meantime?
What is it?
Did something happen to Professor Shin?
How did you know that?
Did something really happen?
She called her friend in England.
What?
She made a call?
What is this about?
Her friend called me saying something was wrong,
and that her phone was turned off.
She wanted her to send a fountain pen.
A fountain pen?
What?
HWAYANG POLICE STATION
-What did she say? -It'll arrive in three days.
I think Professor Shin was trying to buy time for us.
She must have thought that if she called her friend in England,
I would be able to hear about it.
We should hide in Hwayang University and catch Mok Jin-u.
What if he finds out about her lying?
We need to get him before that.
She lied while risking her life.
She knows better than anyone,
that it's the only evidence.
Don't worry. We'll get him this time.
He won't do anything before he checks the pen
with his own eyes. As Professor Shin told us,
it's the one thing Mok Jin-u wants to retrieve the most.
We need to prepare for stakeout during these three days.
That's right, Kiddo. It'll all be over in three days.
These three days...
seem like 30 years to me.
I have a question.
That picture...
was drawn by you, right?
You lived here with your mother.
Do you want an interview or something?
Or is this profiling?
We have three days until the pen arrives.
It doesn't seem like a bad idea
to chat in the meantime.
I asked Jung Ho-yeong once
why he was obsessed with skirts,
and if his mother liked to wear them.
But that...
was your obsession.
It was not his mom, but yours.
Actually,
Jung Ho-yeong didn't have a type.
But...
you did,
because you saw your mother in them.
What was your mother like?
Don't lie! You didn't catch the man behind the mask!
You are invaders, the gangsters who trampled over this country.
Take that!
Mom, I finished reading the comic book.
Mom, Mom!
What? What is wrong with you?
I just...
You told me to call you when I finish the comic book.
I'm sorry, Mom.
Come down. Let's eat.
Okay.
BRIDAL MASK
Did she wear a skirt and stockings,
and go out to see a man?
What?
You must've seen it every day
until you were sent to your grandmother's.
You must've known that if your mother wears a skirt and stockings,
it means she's going to work.
You probably waited alone in this house until she came home.
There must have been many days you fell asleep while waiting.
Then you suddenly...
started to resent your mother for leaving you alone.
Hatred for someone deepens as much as you love them.
You must've hated to see your mom go out.
Am I wrong?
Mom. Look at this.
Read the comic books and play alone, okay?
That's why you killed women in skirts, right?
They reminded you of your mom.
It was you who was repeatedly killing your mother,
not Jung Ho-yeong. It was you.
You don't know anything!
Those women had to die for a reason.
You killed them for a reason?
Don't be absurd.
You think you're different from Jung Ho-yeong, who killed women for sport.
You're wrong.
You're just like him.
I'm different!
I'm different.
All of those women were guilty.
What was Yun Da-yeong guilty of?
What about Nam Ju-hui?
They shouldn't have wandered around at night.
They shouldn't have done that.
What about Lieutenant Kim's mother,
who went out to buy her husband's tie?
I saw her on the bus.
She smiled at another man.
How can a mother like that raise a child properly?
He's better off without a mother like that.
You're wrong.
You killed those women just because you wanted to.
You killed them instead of your mom,
whether they're ordinary or not.
I don't even know how you can tell if a person is ordinary or not.
You just...
enjoyed murdering them.
Just like Jung Ho-yeong.
What?
Are you going to strangle me again?
See? You just want to kill someone.
Strangle me.
Kill me.
Kill me, you murderer!
-It will only take a second. -Gosh.
Can I take you tonight?
Come on.
You can get the prettiest one.
It's a gift for entering middle school.
It's my baptismal name.
Be good to your grandmother.
Taxi!
Let's go.
Kid. You shouldn't come to a place like this.
Those filthy women.
My mom isn't that kind of a person. She's not that kind of a person!
-She's not that kind of a person! -Hey!
My mom...
isn't that kind of a person.
She's not that kind of a woman.
SATELLITE MAP OF HWAYANG UNIVERSITY
Yes, this is Kim Seon-jae.
Professor Shin's office is here.
These two are the only entrances to the building.
Unit Two will stake out near these entrances.
-Yes, sir. -Yes, sir.
Where is the front gate of the school?
These are the front and back gates.
Her laboratory is nearer to the front gate.
Mok Jin-u will probably use the front gate to shorten the distance.
Tae-hui and Min-ha, you will wait for him at the gate with me.
We have to catch him inside the building.
Otherwise, we might lose him.
You and I will wait for him near Professor Shin's office and attack.
Do you think he will show up by himself?
I think he will.
It's too risky for him to take Professor Shin here as the hostage.
Let's catch him first.
Seon-jae. When will the package arrive?
It'll arrive sometime between 10 a.m. and 11 a.m.
Let's move now.
Be at the entrances of the building where her office is.
Yes, sir.
Let's go.
Be on standby at your positions for now,
and we'll take our places at dawn.
Stay quiet.
Stay alert.
An express delivery truck just went in.
It just went in.
OPERATING SYSTEMS LABORATORY
Who's that?
What?
Excuse me. One moment.
By any chance, was there a package delivered to Ms. Shin Jae-i?
Ms. Shin Jae-i?
That's right. I remember. Someone else received it for her.
What?
Thank you.
Chief. Mok Jin-u's not here.
Damn.
These are the front and back gates.
Her laboratory is nearer to the front gate.
Mok Jin-u will probably use the front gate to shorten the distance.
We have to catch him inside the building.
You and I will wait for him near Professor Shin's office and attack.
This is driving me crazy.
He must've sensed something.
We were hiding out since last night. There's no way he could've known.
How could he have found out?
Also, how could he have known Yeon-ho had the fountain pen?
That conversation was just between Seon-jae and I.
Wait.
Don't give up even if you've made a foolish move.
Why? What is it?
What is that? It can't be.
Gosh. Darn it.
That scumbag.
He was listening to everything.
If he dares to lay a finger on Yeon-ho,
I'll kill him.
Gwang-ho. Gwang-ho!
Did you fool me?
Why?
Did you think you'd be able to earn some time?
It's not in England, is it?
Where is it?
Where's the fountain pen?
Tell me where it is!
Yeon-suk...
Forgive me.
I promise I'll...
I'll...
protect our daughter.
No matter what it takes,
I'll make sure to save her.
Then I'll try to find out more about Mok Jin-u.
How he came to acquire his modus operandi.
If we can manage to find clues...
When Jin-u was 11 or 12 years old,
she left Jin-u with her mother,
so that she could go out to earn money.
Every time she visited home, she brought a bag full of presents.
I also got a pair of stockings as a present, sometimes.
Back then, stockings used to be very expensive.
-Stockings? -Yes.
I think she used to work at a place called "Town" or something.
Then, how did his mother pass away?
She died in the hospital. I heard she suffered from alcoholism.
It could be somewhere connected to his mother.
You're looking for Kim Ji-hye from 1985, right?
It says here she died of alcoholism.
What is it you'd like to know?
Her address. Do you have the address of her house at the time?
I'm not sure if this place still exists.
House number 58 of "New York Town" in Mijucheon.
The old lady in Yeon-ho's tape recording also mentioned "Town."
Thank you for your help.
Chief. We found out where Mok Jin-u's hiding out.
I see. You're refusing to answer, aren't you?
Does that mean it's my turn, then?
The person you've been looking for...
is Park Gwang-ho, isn't it?
How does it feel to meet your father who's younger than you?
Since you've revealed a secret that I've had for the past 30 years,
it's only fair that I get something from this, isn't it?
He killed the real Park Gwang-ho,
and he's using his identity and acting as a policeman.
Who should I share this with?
The chief of the crime department?
The chief of police?
Or the press?
Please don't.
Tell me.
Where's the fountain pen?
Yeon-ho.
Shall we hide it in here?
Yes.
The teddy bear's stomach must hurt a lot.
Dad will come back and take it out.
Really?
Of course.
You should never tell anyone until he returns
because this is a treasure hunt.
Okay.
My gosh.
I should've killed you from the start.
Guard every exit!
Seon-jae.
You *!
Hey!
Yeon-ho.
Yeon-ho. Yeon-ho.
Are you okay?
Yeon-ho.
Professor Shin, are you okay?
Are you really okay?
Yes.
HWAYANG UNIVERSITY HOSPITAL
What? Why are you out already?
You should be getting examined.
What did the doctor say?
He said I'm fine. I just sprained my leg.
What happened to Mok Jin-u?
What?
Are you serious?
Did you lose him?
I have the evidence. We just have to find him again.
Let's go.
My gosh.
What? That teddy bear...
You hid it here?
Yes.
Thank you, Yeon-ho.
Thank you, Yeon-suk.
But...
why do you think Mok Jin-u was so obsessed with this fountain pen?
And why do you think he didn't kill me right away?
If he killed me,
no one would've ever found this pen.
Do you think this fountain pen...
meant something special to him?
NATIONAL INSTITUTE OF SCIENTIFIC INVESTIGATION
Is that the result?
Yes, the results are here.
The bloodstains match with...
Yun Da-yeong and Nam Ju-hui's DNA.
We also have Mok Jin-u's DNA and fingerprints.
That *!
What else?
What about the victims from 30 years ago?
It's been too long.
You know we can't charge him with anything,
because the statute of limitations have already expired.
We had no evidence when we had a suspect.
Now, we have the evidence but no suspect.
Where is this * hiding?
DO NOT ENTER, UNDER INVESTIGATION
BRIDAL MASK
These are the numbers of people I killed.
I may be limping right now,
but not a single person could fight me during the Vietnam War.
I should've killed more of those dirty Vietnamese *s.
Jin-u...
We have to get rid...
of all dirty people.
Dirty people.
Mom...
Did you die...
because you were dirty, too?
You guys failed to catch the Bridal Mask.
You are invaders,
the gangsters who trampled over this country.
MURDERS BY MOK JIN-U IN THE HWAYANG DISTRICT
Mok Jin-u mentioned this during the Jung Ho-yeong case.
In cases like these, we need to look at what happened before, not after.
Find his identity.
Then we'll know where he's going.
If he meant what he said,
Mok Jin-u is sure to go after females again.
He won't stop committing murders.
The reason he killed elders while volunteering medical service,
was a passive way to reduce any potential risk factors.
Hold on. Then, do you mean to say he'll commit more murders?
When he was released from the station last time,
he was bold enough to kill another female right after.
According to Yeon-ho, Mok Jin-u
is bound to go after a female that reminds him of his mother.
Like he did in the past, he'll move by foot.
Only this time, the location will be somewhere easier to find.
The victims that Mok Jin-u normally goes after,
are usually found in the downtown area.
Then is it possible he could commit a murder in a different town?
No. He'll still be in Hwayang.
It's hard to break a habit.
Just like how he returned to the crime scene,
he won't be able to leave this town where he committed the crimes.
He has to be somewhere nearby.
We need to know where his next destination will be.
That way, we'll be able to wait for him there.
HAEIN RIVER, PLAYGROUND
Yun Da-yeong was killed by Haein River,
Nam Ju-hui was killed at a playground,
and Son Bo-mi at a park near her apartment.
HWAYANG POLICE STATION JURISDICTION MAP
Where could Mok Jin-u have initially met all his victims?
The place where he first met them?
In the past, he killed his victims at the same place he abducted them.
But he couldn't have done that in Hwayang.
It's more developed, and there are more CCTVs.
If we know the victims' last whereabouts,
I'm sure we can find where they crossed paths.
The bar that Yun Da-yeong worked at is here.
This is the clothing store that Nam Ju-hui went to with friends.
The restaurant Son Bo-mi dined in is here.
This is it. This is his hunting ground.
They were all near Hwayang University.
The suspect has shown up.
What? Where?
He's near the park.
What is this?
But...
why do you think
Mok Jin-u was so obsessed with this fountain pen?
And why do you think he didn't kill me right away?
If he killed me,
no one would've ever found this pen.
Do you think this fountain pen meant something special to him?
Just like Officer Park did to me,
I'll have to take away from him what he cherishes the most.
That's you, Professor Shin.
Park Gwang-ho's daughter.
Yeon-ho. Where are you? Are you all right?
There are still so many that must be punished in this world.
It's all because you went after Mok Jin-u.
Thanks to you, we were able to catch the culprit.
Thank you, and we apologize.
You deserve to die, you scum!
We would like to express our sincere apologies.
You're going back?
I think I've finished everything I was meant to do here.
I'm really going this time.