(Mouse)
(This drama is purely fictional and is not associated with...)
(actual people, organizations, locations, or incidents.)
(Filming was in compliance with COVID-19 guidelines...)
(and counseling was provided for child actors.)
(CGI was used in most scenes that include animals.)
Darn it. I needed an offspring.
A Han Seo Joon Junior.
What if that boy turns out to be like Han Seo Joon?
No. You can't!
You decided...
to have yours.
I'm scared.
I saw a monster.
What if...
my own child...
turns out like him?
(Mouse)
(Episode 19)
Look who it is.
Where is she?
Tell me!
Who?
That detective has your grandchild.
He'll kill him if he doesn't get his daughter back.
Where is she? Tell me this instant!
Grandchild?
How can I have a grandchild?
I thought you had killed Blessing.
You said you did right after it was born.
I'm sorry.
I was wrong to lie.
But please... He threatened to kill Yo Han's child!
Let him do as he wants.
He can kill off the child for all I care.
Don't be like that. Please don't.
Please...
Just tell me where she is.
He's your blood.
My blood?
I have no ties to him.
What?
The whole world is praying for him. Please save...
Mr. Jung's life.
I see that my hands are starting to go rigid.
It's the music I frequently played...
while Blessing was in the womb.
I should look into this.
Tell the warden that I changed my mind.
Please wait here.
I'm sorry, Yo Han.
I can't even fathom the betrayal you felt.
I'm sorry for letting you grow up as that monster's son.
If only I hadn't done such a thing.
You and your family...
would've lived a happy life.
You dared to deceive me?
A worthless cow like you?
Jung Ba Reum.
I should've killed him with my own hands.
How could I have felt guilt for that monster?
I must've been out of my mind.
I knew it. It was Jung Ba Reum all along.
Then, of course, I should save his life.
He's Han Seo Joon Junior, after all.
I need an active brain.
An active brain? What are you talking about?
You never mentioned that before.
Also, where could we even find one?
There's one available.
Sung Yo Han's brain.
What?
Sung Yo Han's vitals are stable now.
He's on the road to recovery.
How many...
would want to see Sung Yo Han...
- make it out alive? - Still,
he's your son.
He should at least do one good deed in his life.
My Yo Han...
would want to repent in any way possible.
But still, how can we...
Consider this operation over then.
Wait a second.
You... You harvested his brain...
while he was still alive?
From my Yo Han?
Didn't you know? So much for Mother of the Year.
How could you not have known?
No... No!
How...
You!
You murderer! Bring back my son.
Bring my son back to life!
I did what you asked. I saved your son's life.
Jung Ba Reum.
This is what you get for crossing me.
Sung Ji Eun, Yo Han's blood is on your hands.
I'll kill you!
Didn't all the inmates receive a blood test...
to get tested for AIDS before Na Chi Kook's accident?
Yes. But why do you ask?
Were the blood samples here when Sung Yo Han came?
Just a second.
The day of Chi Kook's accident...
Yes, the blood samples were taken to a facility the next day.
Did Han Seo Joon's blood come out normal?
Han Seo Joon?
Just a second.
Some of the blood samples were contaminated,
which were labeled as "unable to check".
And Han Seo Joon's name is on the list.
Why were they unable to check?
They either got contaminated with foreign substances,
or the amount of blood wasn't enough.
Did you leave your office the day Sung Yo Han was here?
Yes, I had to leave for an emergency.
He was here for Han Seo Joon's blood.
Sung Yo Han wasn't Han Seo Joon's son.
Then what's this?
He brought a strand of hair...
and asked me to check whether the two were related.
(They are mother and son.)
"Don't cry."
"Jae Hee. We're the only ones..."
"left in this world now."
What?
"You're the only family..."
- "I have left, Jae Hee." - I have left, Jae Hee.
We're the only ones...
left in this world.
There's something...
I need to do.
Once I'm done with that,
I'll come back for you.
Then the two of us can finally...
be happy together.
I hope that you won't...
let Yo Han take over you.
I...
I was Han Seo Joon's son.
He knew I was his son.
So he killed Sung Yo Han to save me.
Don't tell me you implanted Sung Yo Han's brain inside me.
I hope you live...
a kind and upright life,
my baby.
She must've seen it.
Poor Bong Yi.
You dumped me.
Why are you hugging me all of a sudden?
What are you doing here?
I think Detective Ko knows...
that you killed Kang Duk Soo.
I came to tell you that.
I told him.
Oh, I see.
Then I guess I came for nothing.
I only came to tell you that.
I should go now.
No, no way.
Ba Reum can't be the only person...
with a scar on his arm.
No, it can't be him.
No way.
No, it can't be.
I saw a monster.
I saw him...
push his own mother out the window.
But I couldn't say anything.
I couldn't even call the police.
We need to end our babies' lives...
before they do something horrible like that.
What do you mean?
Brace yourself.
Keep a close eye on him,
and if you ever think he might turn into a monster,
just kill him.
Please take...
good care...
of my baby.
Yo Han...
Hello.
Goodness.
Did you find your baby?
What? What are you talking about?
Did you get any calls saying they found a baby?
- A call about a baby? - Yes.
No, there's nothing here.
But a middle-aged lady got into an accident yesterday...
while holding a baby.
Can I check the CCTV footage?
Can you zoom in?
What about the baby?
You don't need to worry. He didn't get injured.
- I see. - But unfortunately,
the baby's guardian is in a very bad condition.
She got severely injured while trying to protect the baby.
Mom.
I'm sorry.
I'm sorry, Mom...
Mom.
Are you awake?
Mom.
I'm sorry, Mom.
I'm sorry.
I left...
Hyun Suk alone.
I was too scared.
It's my fault.
It's my fault he...
I didn't know how to face you and Dad.
I missed you so much, but...
Mom...
Hello?
I'm so sorry.
He took... He took...
the baby.
Who did?
What?
My dad?
No. No.
Eun Chong.
Are you the baby's mom?
Yes.
I'm sorry.
My wife is very sick.
I think that's why she took him.
I'm sorry.
If you want to punish her,
I'll take the punishment for her.
Eun Chong.
Dad.
Eun Chong.
Sung Yo Han came to collect Han Seo Joon's blood.
He wasn't here to kill Na Chi Kook.
What if it wasn't Sung Yo Han?
We carried the box to the auditorium together.
How did the killer manage to move a grown, unconscious man...
all the way to the magic box in the auditorium?
- We chatted and said goodbye. - Good luck. Don't get intimidated.
What if the magic box was here?
After I saw Chi Kook leave, I pushed the box inside.
What if this was where the killer put the body inside?
Inside the box, there's a mirror placed diagonally.
You make the person go inside the mirror.
I only know what Ba Reum told me.
I left it here once I brought it in.
What if he lied to me?
I stepped away for lunch.
But why would he lie? He has no reason to lie.
I'm the one...
What if it was Ba Reum?
Kim Joon Sung said he hacked Finance Team Three's system.
(Ministry of Science and ICT)
Ministry of Science and ICT
Finance Team Three?
But we only have up to two.
What?
What are you doing in a cafe?
I have no choice. The commissioner will have my head if he sees me.
I can't go within 100m of Moojin Police Agency.
So why did you beat him up?
But...
It wasn't Officer Jung, right?
Even from a psychological aspect,
he's... No...
There's no way.
The thing is...
Never mind.
Why did you stop mid-sentence? I hate that.
- Did you bring it? - No, I didn't.
You know it's illegal to steal pictures of evidence.
My dad's election is just around the corner. Although he won't win.
The bottom was cut out the same way.
It's the same size.
(From Lee Min Soo. Here is my resignation.)
(Letter of Resignation)
He resigned? Via email?
That rude punk.
With Moo Chi freaking out like that...
and Detective Lee resigning...
We should look into Ba Reum.
Quietly trace Ba Reum's whereabouts immediately before the murders...
of Kang Duk Soo, Lee Jae Shik, and Kim Byung Tae.
Yes, sir.
I wanted to see him so much.
I wanted to see Yo Han's baby so much.
I'm sorry.
You know...
what kind of pain your son lived with.
You know he tried to commit suicide...
just because he was...
Han Seo Joon's son.
There's something you need to know.
What is it?
Han Seo Joon's son is Jung Ba Reum.
What do you mean?
Ba Reum was wearing the onesie...
that my mother made.
How could he...
I think the moms...
You just watched Yo Han live in pain...
without saying a word.
I won't be like you.
I won't...
let my son live wrongfully as a murderer's son.
I'll put it all back...
personally.
I was hurt after you left like that.
It's nice to see you again.
So? What happened to your baby?
Did your dad kill him?
My dad isn't a monster like you.
I'm disappointed.
I guess he's very different from you.
But then again, strictly put,
you're more like me.
Hyun Soo. Go first. Go on.
No. I can't leave you.
This may be your last chance.
I'll be right behind you. You trust me, right?
We may get caught and brought back, so let's hide this here.
You found your way out.
I thought you had starved to death in there.
(Ttukbang Market)
There he is!
Please say a few words.
- Over here. - Here!
- It wasn't me. - You monster!
I didn't do it.
What do you think about the head that was found in the snowman?
You should've killed me back then.
If you had, Ko Moo Chi wouldn't have gone mad...
and your son...
would've grown up with a father.
Aren't you curious as to why I came to see you?
Han Seo Joon,
I'm going to kill you.
In the cruelest way possible.
How?
Look forward to it.
It will exceed your expectations.
It will exceed my expectations?
Finance Team Three?
But we only have up to two.
You have one message.
Yo Han, it's Joon Sung.
What you asked me to look into...
has me terrified.
Maybe hacking wasn't the right idea.
The organization goes by the name "OZ".
("Codes and Hacking")
(All Books)
(Kitty Cafe)
(Gluttony, Envy)
(Sloth, Hatchet)
(Shower room, Pride)
(I am the Almighty.)
(Wrath)
No, it can't be.
How can it be Jung Ba Reum?
All I have is the same-sized shoe print.
That can point to almost anyone.
No way.
All I have to do is find evidence that proves Ba Reum's innocence.
I'll do it myself.
Why did Sung Yo Han kill my grandmother?
Over a photo, I think.
She held onto one tightly till her last breath.
A photo?
She took one from Sung Yo Han's house.
It turned out to be a photo of Jo Mi Jung's body.
Bong Yi!
So this is where it was.
Moo Chi must've brought it in.
Bong Yi, come in.
What were you looking for again?
The photo she clung onto...
the night she died.
Let's see.
Here it is.
Moo Chi spent his time looking at this too.
Your grandmother had burns on her hands from clutching this.
Right. This will do.
This was the reason.
Granny must've recognized the button.
He knew he'd be identified as the killer.
Darn rat.
What's wrong?
It's nothing.
This isn't the only reason why I'm here.
I still haven't received my grandmother's brooch.
Get out here. Get out here, you scumbag!
Jung Ba Reum. Jung Ba Reum!
Did you name the kitten?
Yes, Toto.
That's the name of the dog...
that comes out in "The Wizard of Oz".
If you have any questions about taking care of Toto,
ask questions on the site called "Kitty Cafe".
(Kitty Cafe)
(Raising a child and taking care of a baby kitten)
Mommy went to Grandma's house.
Yes. Jeju Grandma.
(Jeju Oyster Gukbab)
- Mom! - Yes, Hoon Suk?
Ba Reum's here!
Hoon Suk, your mom and I need to talk,
so how about we play later?
- Let's play right now! - Hoon Suk.
Why don't you play with Seung Ho?
Okay, fine.
Ba Reum, promise that you'll stay.
Play with me later.
Who are you?
Who on earth are you?
Who are you?
Seung Ho isn't home.
Who are you exactly?
I...
am a former fencer who was recruited by the organization.
An individual interview led me...
to an private operation within the origination known as OZ,
and I volunteered to join.
My first assignment?
(Jung Jae Hoon)
I was to take you under my wing.
(Jung Jae Hoon)
The job had formerly been Song Soo Ho's.
But while trying to protect you, he killed your family by mistake.
The guilt drove him to quit the organization,
so I was sent to replace him.
Are you Jae Hoon?
You poor thing.
My poor nephew.
Who are you?
I'm your aunt. I'm your mom's sister.
I was living in the US, so I heard the news late.
Auntie.
It hurts so much.
Don't worry.
You'll live with me now.
My job was to keep a close eye on your every little behavior...
and report it to the higher-ups.
You even secretly changed my social security number...
while pretending to register me as your family.
This is hilarious.
Are you sleepy? You should go and sleep.
- Okay. Good night. - Good night.
I was scared, so I quickly made you move out.
Then I got married and had Hoon Suk. But...
Buy me a cat.
But I never even imagined...
you'd run into Hoon Suk.
My mom was sick, so I had to urgently leave.
And as soon as I found out Hoon Suk was at your place,
I was terrified of what you might do to him.
But just as I was on my way to bring him home...
My son is at Jung Ba Reum's house.
I'm worried he might hurt my son.
No. If you go now, you'll ruin everything.
Are you nuts? What if that monster kills my boy?
I need to go.
Get off me. Let me go.
Mom.
Who gave you permission to come here?
Do you know how much I looked for you?
I quit my job that day.
And they told me to tell you I got transferred to the US.
So I was pretty much...
part of "The Truman Show".
Did they purposely hit me with a car when I was chasing Sung Yo Han...
because they didn't want me to meet him?
They found out Daniel Lee and Sung Yo Han on the phone...
and were worried their plan might get ruined...
if Sung Yo Han told you everything.
That's why...
I can't believe I tried to kill him without even knowing that.
Those guys would've killed him anyway...
even if you didn't try to kill him,
or even if he wasn't shot by that detective.
I overheard them saying they got there too late...
and that they quickly left the scene after Sung Yo Han got shot.
How could someone take things this far?
That person has a very strong belief.
And I also once agreed with it.
A belief?
At first, they pick victims who live near their house.
Then they start going further away to kill people.
And they even travel long distances to commit murder...
because they become confident.
Back then, this was where Ba Reum lived.
Ba Reum lost his memory due to the surgery.
That's how he was able to forget that he was a serial killer.
But his instincts were still there.
Anyway, you've changed a lot. You keep surprising me.
To be honest, before you hurt your head,
I didn't think this job was a fit for you.
But now, I feel like...
you can read the mind of killers.
What if it really wasn't Sung Yo Han?
What if it wasn't him?
Then that means I killed the wrong person.
No, that can't be.
Then why did Sung Yo Han try to kill Ba Reum?
He went there to kill him because he was a witness.
Why did Sung Yo Han go to Ba Reum's house?
Where's Han Kook?
- Han... - Yes, Han Kook.
Tell me where he is, you scumbag!
Sung Yo Han was trying to tell me something that day.
- What? - Hwa...
"Hwa".
Mi...
"Mi".
Ji.
"Ji".
"Hwamiji"?
Is it a daughter? You don't know yet?
I really hope it's a daughter.
I'll call you back.
Did you check where Jung Ba Reum was on the day of the incidents?
Yes, I checked his alibi. When day Kang Duk Soo died,
he was home with his cousin.
But it's hard to check with the other cases.
- I feel like he would've been home. - You feel like it?
Check properly.
Go and check all the CCTV footage near Jung Ba Reum's house.
Okay, sir.
There's a CCTV here.
Then I'll just have to check that one.
But it's illegal.
The presidential election is coming up.
But the guy with the most votes is winning by a huge number anyway.
Let's just quickly check.
Where can I check the CCTV footage?
I've seen this somewhere.
(Photos)
What is this?
Why does Officer Jung have Kim Joon Sung's laptop at his place?
His laptop wasn't at the murder scene.
Where's Detective Kang and the captain?
They urgently went to the suburbs.
The son of the first witness of Kang Duk Soo's murder...
died due to a car accident, but they think something's off.
- Really? - Yes.
I got a missed call.
The person you have reached is unavailable. Please leave...
Why isn't he picking up?
(PC e-book)
(All books)
Why is there a fairy tale here?
("The Wizard of Oz")
(List)
This is Detective Shin calling from the Special Task Force.
Can you run a forensic investigation on a laptop?
I have a lot to do right now, so you'll have to wait.
- I'll call you as soon as I'm done. - Okay.
(Detective Shin)
Who's there?
I'm from the police.
Oh, I see.
Did you find anything strange while demolishing this house?
No, we didn't find anything.
He also asked the same question.
- Whom? - He asked if we happened...
to find anything here.
He seemed like the house owner.
Wait.
- Was it him? - Yes, it was him.
I guess it really was him. The National Son, right?
What did he do here?
He just stood...
absentmindedly...
in the basement.
"The basement"?
- There was a basement? - Yes.
It was right over there. The door was on the ground.
(Jung Ba Reum)
I needed insurance.
I saved it for Hoon Suk's sake.
(Jung Ba Reum, Sung Yo Han)
(Predator Gene Investigation)
The investigation notes Song Soo Ho kept in 1995.
When Sung Ji Eun was attacked by a mugger,
he showed his face to her while saving the fetus.
Give birth to your child.
So he switched with the person monitoring Kim Hee Jung.
Song Soo Ho was in charge of Kim Hee Jung from then on.
(Expert confirms Jung Ba Reum is a predator.)
Jung Ba Reum is confirmed to be a predator.
Sung Yo Han determined not to be a psychopath,
and they stopped monitoring him.
Camera, wiretaps, cloned phone, traced regularly.
Jung Ba Reum is confirmed to be a predator,
but he is suppressing his murderous instincts.
Trigger needed.
The trigger will be Song Soo Ho,
who murdered his family.
That was why Sung Yo Han...
I'm scared, Jae Hee.
I can't trust anyone.
Police?
A man was stabbed.
I think it's Dr. Daniel Lee, that geneticist.
The people who showed up weren't cops.
You're a reporter, correct?
I want to report Dr. Daniel Lee missing.
Star Coffee Shop on Odeo Road.
(Karaoke)
That was why he came to me alone.
How long must I wait?
Sorry. I don't think I can do it tonight.
I'm still working.
- Bring it tomorrow. - No. It needs to be right away...
What...
Are you looking down on me because my dad's losing?
What are you doing here? I thought you quit.
Well...
I came to get my things.
At this hour? Now?
Okay, then. Later.
Why won't you pick up?
Hi, Moo Chi. Hi, Da Seul.
It's a girl?
Yes.
Okay, be right there.
- Detective Shin! - Yes?
Let's grab a drink...
to celebrate my leaving.
We can drink at your going away party.
- Later. - Don't be that way.
My wife is waiting for me.
We're having a girl.
I'm going to love her more than anyone in the world.
Later.
Exactly. I'll buy you a drink to celebrate.
Thanks, but I have to go.
Please.
What has gotten into you?
Sorry. Let's drink another time.
He just left with it.
Hello.
Can you tell me what this is?
(National Forensic Service)
(Detective Shin)
Why did he call? Is something wrong?
How cute.
Sorry.
What are you...
(My Role Model)
Presidential candidate Shin Sung Min's son...
was stabbed to death.
Sang.
No.
Sang. Sang.
- Stop it. - Sang.
Stop it.
Sang! Sang.
- Stop it. - Sang.
Who did this?
Who did it?
- Calm down. - Enough.
Who was it?
Moo Chi.
Items that appear to belong to Kang Duk Soo,
Lee Jae Shik, and Kim Byung Tae...
Kang Duk Soo?
Ba Reum, you scumbag.
They were found by the body.
Neither Captain nor I received his calls.
We were in the countryside...
They found Kang Duk Soo's things with Sang?
Kang Duk Soo's lighter,
Lee Jae Shik's button, and Kim Byung Tae's earring.
Ba Reum, you scumbag.
He wanted to drop off a laptop with the cyber unit,
but it isn't here.
It's not in his car either.
The CCTV. CCTV.
CCTV. CCTV.
CCTV.
Why won't he pick up?
Mr. Ko?
It's me. Ba Reum.
I saw that you called a lot.
Where... Where are you?
I'm on my way home. Is something...
It's because of that.
He died because of that laptop.
Why did he have that?
Yesterday, I told him to check the CCTVs...
near Ba Reum's house.
Ba Reum, that scumbag.
It wasn't Officer Jung.
I checked, and he was in Jeju during the time of the incident.
He came back this morning.
- Are you sure? - Yes.
He was on the flight manifest and caught on camera in the airport.
He's here.
I assumed you wouldn't go, so I asked him to come.
Get that hand checked out.
- How is that important right now? - Hey.
- Just get it looked at. - Captain!
Taking pills like these is the reason...
you can't control your emotions.
Why are you even taking these?
What are they?
I found them on the floor of the task force office.
Isn't it yours?
This...
It takes at least 20 minutes. No, 20 minutes isn't enough.
20 minutes isn't enough.
Isn't this a painkiller for headaches?
It says so on the bottle,
but the pills inside say a different story.
It blocks serotonin from being produced.
Serotonin?
Serotonin is a hormone that suppresses our violent nature.
Having a low level of it...
limits your ability to control yourself...
thus turning you more violent.
Why was Ba Reum taking these?
- You can't go in. - I only have a few questions.
I'm Detective Ko Moo Chi from Moojin Police Agency.
Thank you.
Are you the one who prescribed these?
Yes, I prescribed them for my patient Jung Ba Reum.
He has been suffering from frequent headaches.
Really? Well, that's weird.
From what I hear, taking these...
makes you lose control and turn violent.
That's impossible. I only prescribed painkillers.
It could've been the patient himself...
who swapped them out.
Of course.
I'm sure there's no way a doctor would prescribe such drugs...
to a patient with headaches who had a major brain surgery.
Thank you for that. Have a good day.
I almost forgot.
I see you were on the phone.
I was just about done.
Can one obtain such drugs...
without a prescription though?
I'm afraid I have a patient in critical condition.
We'll pick this up later.
Yes?
No, I didn't call.
What?
Did a police officer stop by?
I'm with the police. May I ask you something?
You see, the contents of this bottle doesn't match the label.
Who prescribed them?
They were for Jung Ba Reum.
This wasn't prescribed to pick up at this station.
The director brought it in himself,
and we only handed it over.
Got it.
Ki Hyuk, ping the location on the number I'll be sending you.
It's a burner phone that pings off three locations.
Three?
Give me the list.
(Warning)
Ki Hyuk, put a trace on that number.
How are you here?
Not long ago, Daniel Lee commissioned a murder.
Here's your next target.
Consider this person a top-class predator.
This is the address he gave me.