Original subtitles

About the incident 15 years ago.

Seno's father might be a terrorist himself.

And another terrorist spy connected to Seno's father

was hiding in the Coast Guard.

That was Nariai.

Captain!

Nariai.

What are you doing here?

Dr. Seno's boat has already left the harbor.

Nothing to worry about.

Hey.

Do you know something about the spy?

How about you try it?

The splendid alfonsino here tastes pretty good.

Put down your chopsticks and get prepared now!

Calm down, Niina.

What's the matter?

Fifteen years ago.

Nariai and I went to the sea from here.

I remembered that day.

That's all.

How did my father get involved in that incident?

For 15 years long, no matter how much I thought about it,

I couldn't figure it out.

Nariai...

If he is alive, why didn't he tell us?

This photo was found in Lopez's phone.

So it is reasonable to assume that Nariai is connected to Black Butterfly.

I get it. And?

Why did he show up again?

Who knows about this?

Only Nishino and Kanda.

I see.

Are you alright, Niina?

I am alright.

"Coast Guard Officer Saves Boy from Bombing"

Request from Kanagawa Prefectural Police.

Nishino.

The victim, a woman in her 30s, died of drowning late last night

and was found yesterday morning at Kaisei Pier.

She hasn't been identified and no missing person report has been filed.

A diamond this big

isn't something ordinary people can afford.

How come this wasn't stolen?

Are you saying she committed suicide?

But why DCU?

This is the reason.

The water in the victim's lungs was analyzed.

Arctic Ocean Plankton?

A woman drowned in Arctic Ocean was found dead in Yokohama Port?

And how is it possible that she could have washed ashore in just one night?

It's impossible.

The woman was most likely drowned in Arctic Ocean water

and then dumped into Yokohama Sea.

Yes, this was a murder disguised as suicide.

We'll conduct joint investigation with Kanagawa Prefectural Police.

Let them handle the interviews and victim's identification.

We'll locate the murder scene.

Locate?

Explore the source of seawater.

Identify ships that entered the port through the Arctic Ocean within a week.

Thoroughly inspect the cargo.

Any cargo that requires seawater, collect all of that water.

We also need to inspect all the cargo on ships that indirectly traded via the Arctic Ocean.

Which of these containers passed via the Arctic Ocean?

Just around this area.

Let's collect it one by one.

Thank you so much.

Let's check that next one.

Ballast water from a ship arriving in Yokohama from the Arctic Ocean.

It doesn't have to be that big for me.

Speed up the analysis.

Yes, sir.

So expensive.

Captain, we're back.

Excuse me.

Mako-san, can you take a sample of these as well?

- Leave it there. - Okay.

Thanks.

- Mako-san. - Hmm?

Last week was...

...the anniversary of my father's death.

Did you and Captain

visit Nariai-san's grave?

Niina was on duty.

Maybe we'll go this weekend.

What's the matter?

Nothing. Excuse me now.

I'm counting on you.

P-pico... Pico pico?

I re-examined the water in the victim's lungs.

The plankton? It appears to be the same as the Prefectural Police data.

I found one thing that caught my attention.

The picoplankton here.

These are plankton that don't belong in the Arctic Ocean.

So, which sea it is from?

More to the south.

It could be the species from the South China Sea.

You mean she was drowned in two seas?

That's not possible.

It's certainly not.

No, there is one such place.

A place where plankton from the Arctic Ocean and South China Sea

exist together.

All right.

Was it from Nishino-san?

It's not Kamioka Marine Park.

So this is the only place left.

Let's go.

This is the main tank of the aquarium.

We just recently renewed it with new fishes

from the South China Sea.

Among them, the humphead wrasse is

a newcomer who is expected to be the centerpiece of the renewal.

Will be nice when it's deep-fried.

The sashimi wasn't so good, though.

Captain!

Sorry.

What are you investigating for?

What is that person doing?

Fish health check.

- A vet? - No.

A fish supplier. He procures it for us.

Fish supplier?

Well, he's the so-called fish coordinator.

Yes.

Kimi-san coordinates all aspects of the project,

from fish catching to transport and breeding methods.

He also coordinated this renewal.

I see.

Hello there.

I'm sorry to disturb on your busy day.

We're examining water at some aquariums for a certain case.

Can you help us?

Certain case?

We can't tell you yet.

What can I help you with?

Can you fill this with seawater from the tank?

- Sure. - Thank you.

Here you go.

Thank you so much.

What were you doing with the triangle earlier?

The triangle?

That was...

I heard that there are fish that eat by hearing sounds.

Is that right?

You know it well.

The stingray is baited to eat when it hears the triangle sound.

It's popular among the kids.

But it didn't seem to eat earlier.

I know.

It suddenly stopped eating.

I hope it gets better soon.

- Do you need anything else? - No.

Thank you for your cooperation.

Most definitely, this aquarium.

So what is it that you want to confirm?

Three days ago, a woman was found drowned in Yokohama Port.

We assumed it could be related to this aquarium.

Can you please confirm it?

Is she someone you know?

Yes.

She is Takada Kazumi-san, an aquarium desginer.

She also designed our aquarium.

Does Kimi-san know about this?

Do you mean Kimi-san the fish supplier?

Kazumi-san is Kimi-san's fiancée.

We need you to confirm.

Please give me a moment.

That isn't Kazumi!

Because...

We're supposed to get married in three months!

In Sydney, Australia.

The victim is Takada Kazumi-san, 38 yo.

She was an aquarium designer

for a company called Japan Acryl in Shibuya.

She met Kimi-san the fish supplier at a launching of a certain aquarium

and they started dating since.

They were supposed to hold a wedding in Australia, right?

Yeah. They were planning to live there after the wedding.

His dream was to work on aquariums around the world,

and Takada-san seemed excited for it.

Incidentally, she also designed the aquarium in question.

Kimi-san and Takada-san hadn't been in touch

since their wedding dispute

four or five days earlier.

But still, fish suppliers make so much money, don't they?

Yes?

All right.

Permission granted.

The prefectural police will conduct a background check on the victim,

and we DCU will examine the aquarium where the crime took place.

Yes, sir!

Wait, what's going on?

We're opening the aquarium soon.

We will now commence an investigation of this aquarium.

All staff members will be interviewed.

Hold on a moment!

What investigation is this?

Just when the fish are getting used to their environment here.

We now find out that Takada Kazumi-san was murdered in this aquarium.

This is the crime scene.

Please stay out until the investigation is over.

Kazumi was murdered here?

We will be very careful to avoid stressing the fish as much as possible.

Do you have any idea what we have gone through to build this aquarium?

A person has died in here.

That may be true, but...

Is there something we shouldn't know about?

Of course there isn't.

Nishino.

Please stop that water stream.

You can't! If you do that, the fish will panic and die.

Isn't that right, Kimi-san?

I can't allow you to do that.

You heard him. Please don't stop the stream.

Very well.

Nishino, keep the water stream.

Roger.

Kanda and Morita, check footages of the building's security cameras.

Seize any information from the day of the incident.

Yes, sir.

This is data from the aquarium's entry records.

- Here. - Thanks.

No results.

Yeah, nothing from her belongings.

The seawater circulation filter has just been cleaned.

Not a single hair of the victim was found.

We didn't get much from the aquarium entry records either.

The only thing we knew is that on the day of the incident,

the main tank contained fish from the Arctic Ocean

had been renewed and replaced by fish from the South China Sea.

So that's how the plankton from both seas was detected in the victim's lungs.

Takada-san was in charge of the main tank design,

so she participated in this renewal process.

But on the day of the incident,

the main tank was always surrounded by people.

It appears that she wasn't left alone with anyone

until 5:00 pm when she left the building.

Any word from the Prefectural Police?

Takada-san apparently dined at a wine bar after leaving the aquarium.

She left the restaurant after 10:00 pm.

Based on the contents of her stomach, there's no doubt about it.

Estimated time of death was about an hour later, around 11:00 pm.

According to access logs, there were no staff left at the aquarium at that time.

Negishi-san the producer left the last at 10:30 pm.

But there is no record of Takada-san herself re-entering the building around 11:00 pm.

But the water from that tank was detected on her.

What does that mean?

There is no footage on security cameras of her coming back.

So you are saying that

nobody was in the aquarium at the time of the incident?

Kimi-san wasn't there either.

He left at 9:12 pm, long before it.

The bartender at the wine bar testified that she seemed to be worried about marrying Kimi-san.

Could he have another woman?

I checked the security camera footage from one end to another.

There was no record of Nariai Atsushi.

I see.

But I tried to run the images posted on social media

through the facial recognition system.

And then...

97% matched.

But the account had already been deleted,

so I couldn't identify who posted it or the location.

He seems to have been captured in a landscape photo.

What's that white building behind here?

I'll look into it.

But this might not be enough...

"Nariai Atsushi is alive."

Hey, did something happen to Seno-kun?

Seno? Why'd you ask?

He was acting strange the other day.

How about we visit his grave next week?

I still have some work to do.

OK, I'll go by myself.

I'm sorry.

- See you. - Have a nice day.

Nariai is not asleep there.

It was confirmed to be the victim's bag.

Okay.

We checked Kimi Ichiro's travel history

and found something intriguing.

What is it?

Kitagawa.

The red one is Kimi's movement.

The yellow one is Takada-san's movement.

Watch.

What place is this?

Funabashi Shopping Plaza.

So they were shopping together?

It was after closing time.

Moreover, they were in separate cars

with Takada-san keeping her distance.

So she was following Kimi.

Did she suspect him of having an affair?

Nishino, find out what they were doing around this shopping mall.

Okay. What about you?

I will follow someone I'm cautious of.

How can I help you today?

Actually, I came here because there is something I wanted you to see, Negishi-san.

This is it.

Found among Takada-san's belongings.

It's the same ballpoint pen you own there, isn't it?

This is a souvenir Kimi-san bought from a trip to Russia last year.

Maybe Kazumi...

I mean, Takada-san also owned one.

I'm sorry. It was kind of hard to say, given the circumstances, but...

Kazumi was a close friend to me.

I see. What about with Kimi-san?

Since we met five years ago,

we've been in perfect sync together.

Is that so?

Who gave you those diamond earrings?

This is something I bought on my own.

Actually, Takada-san seemed to be probing whether Kimi-san was secretly seeing someone.

It was you, wasn't it?

It wasn't me.

I have a child.

I see.

Thank you. I'll be leaving now.

I'm sorry, it's from my child's teacher.

Thank you for your cooperation.

Hello?

I know.

The river always flows out to the sea.

Don't worry, I will be not rushing.

She seems to be related to Kimi.

Alright guys, keep an eye on Negishi Nayu.

All right!

Nishino, find out the relation between the photos

taken at the aquarium office.

Okay.

Kanda, recheck again the security cameras that day.

Roger.

Seno, you help her.

Yes, sir.

Morita and Otomo, follow me.

Yes, sir.

Nishino-san.

What?

You and Captain seem to be getting along well lately.

I told you, I'm going to help him build his team.

I saw you all secretly meeting the other day.

What were you talking about?

Seno-kun, over there.

Just nevermind.

Did something happen?

How long are you going to hide about Nariai-san from Seno?

Not now.

Nariai may be connected to his late father.

Very well.

Just know that he has good instincts.

- Thanks. - Please check it.

Security camera footages from the day of the incident.

And here is the list.

We're gonna check all of this?

That's right.

How did Takada-san get into the aquarium and how was she murdered?

Find the clues to it.

Wait, there are 40 footages.

How many days do you think it will take?

That much?

Well then, maybe you'll find something.

- Kanda, come with me. - Okay.

This is it.

Well done, Seno.

I'll go to the scene and confirm it now.

No, I just happen to have some tasks in the aquarium.

I will go confirm it.

You keep on checking footages.

What? But I already found the route...

Still no clue as to how Takada-san was murdered.

There are still this much.

I'm counting on you.

Hello. What do you need today?

I've already talked to the prefectural police.

Well, I'm sorry to keep coming back.

Thank you for your cooperation in this investigation.

Of course I will cooperate.

By the way, about Takada-san's engagement ring.

It seems to be quite expensive.

How could I, a fish supplier, afford it?

Is that what you're wondering about?

It is rude, but yeah.

I could afford it because I'm a fish supplier.

Because we buy fish from overseas,

I am often in contact with foreign buyers.

The ring was a special gift

from a Russian jewelry buyer.

I see.

Is that how Negishi Nayu-san got one as well?

The diamond earrings.

I can't say that much.

Very well.

It was just as expected.

The route Takada-san used was

through the back service entrance and down the east corridor.

This route would get her to the aquarium without being caught by security cameras.

It's also possible to commit the crime.

Kanda obtained some interesting information.

The buyer Kimi is referring to

is probably this man.

Andrey Eifman.

Who is he?

A Russian Jew.

Apparently, he appears to be an international lawyer specializing in trade transactions, but

in the back, he is rumored

to be the head of Russian-based diamond smuggler.

So he bought that diamond from this man.

Okay, let's start a more in-depth investigation.

All right.

You've worked hard.

You too.

Looks like a tough job.

Not at all.

You're just as stubborn as Niina.

What...?

Here.

Thank you.

You know.

Niina also used to hate being assigned to a low-profile investigation.

But at some point, he started taking the initiative.

Why?

Nariai-kun.

He was... you know...

He had some kind of peculiar flair.

"The river always flows out to sea," he said.

No matter how low-profile the investigation was, he always brought results.

I think it was his influence.

Mako-san.

Are you still thinking of Nariai-san?

Huh?

Ah...

That's how people usually still pry into it.

I know it's been 15 years, but

I sure haven't forgotten him.

I still wonder if...

...things would be different if his body had been found.

I do think of it.

Supposing that...

Nariai-san

was alive...

What would you do, Mako-san?

Huh...?

I'm sorry, I shouldn't have said that.

I'll work hard on this.

- Well, do your best. - I will.

Thank you for the refreshments.

Seno, wake up!

I'm sorry, I fell asleep.

Look at this.

December 18, 6:12 am.

Takada-san was murdered the next morning.

What's going on?

This is the valve that regulates the water stream.

Why was the valve rotated?

Wait, why are you people here?

It won't take long.

We need to inspect something.

I can't allow this.

Now it's just us.

If we're back with a warrant, there will come a lot more.

Kimi-san.

Let's go.

Excuse us.

- Hold on! - Stop them!

Stop it.

Roger.

I found it.

How did that scratch get on the tank?

Scratch?

What do you mean?

It's possibly the result of when Takada-san resisted in the tank.

A scratch of the diamond ring.

If the scratch matches the shape of the victim's diamond...

It would be conclusive evidence that Takada-san was in the tank.

Acrylic panel made of the exact same material as the aquarium tank.

Can I start?

Please.

How's it?

No. It didn't match at all.

Takada-san's diamond won't make this scratch.

Does that mean it was scratched by unrelated thing outside this incident?

Let's try it underwater.

Underwater?

We'll recreate it in the same environment.

Okay, here I go.

I'll give it another shot.

Seriously?

Try it from the opposite side.

Okay.

Give me that.

Captain...

- Hold it tight. - Okay.

You can't force things that shouldn't be.

Let's try a different angle.

Captain!

The ring!

Seriously? It's 10 million worth!

Does this count as a workplace accident?

Or will Captain pay for it?

Why are you in a daze?

Find it!

Find it at all cost!

Hurry up! Hurry up!

Found it!

I was utterly dumbfounded.

Good grief.

That's right.

What now?

We're here to arrest you for the murder of Takada Kazumi-san.

Arrest?

What is the reason?

Where is the evidence?

It was a troublesome finding.

Because you, the murderer, couldn't find it yourself.

We have found the evidence.

- Get ready. - Okay!

Excuse me. Please shoot this.

I caught the stingray in this tank a few minutes ago.

It is under anesthesia right now.

Hey, don't do things as you please.

- Call Negishi-san here. - All right.

Hurry up, call her!

Kimi-san.

We suspected that the scratch on the tank was caused by

the diamond on Takada-san's engagement ring

when she was murdered.

However, the scratch didn't match.

What on earth are you trying to imply?

You said it, didn't you?

That the fish won't eat.

I did.

What you were looking for in this tank

was in the stomach of this fish all along.

That's why the fish wasn't healthy.

Start now.

All right.

Please start.

Found it.

Takada-san was wearing a diamond ring.

And yet, there was another diamond in this tank.

This is the evidence that you murdered Takada-san.

I have studied about diamonds.

This is a round brilliant cut.

And this one is a rose cut.

After Takada-san was murdered,

you noticed that the stone was missing from her ring.

However, no matter how hard you searched, you couldn't find the stone.

You exchanged it to another diamond ring.

A different one from the previous.

Rose cut diamond.

Of course, it was intentional.

If the cuts are different, the scratch on the tank will not match.

No matter how many acrylic panels we did experiment with, the scratch wouldn't match.

Indeed.

I did mention that there is cheaper route to get it.

But it's a diamond.

There is no way I could afford to buy many.

Kanda.

Live report from the crime scene.

This is a paper company you own.

Take a look over here.

Diamonds worth 400 million yen in market value were found!

No! Stop it!

I'll be in big trouble if you take that!

Negishi-san! Does she know about this?

I also showed her the warrant for your arrest.

You were smuggling diamonds behind your job as a fish supplier.

Takada-san noticed your dirty secret.

That's why you murdered Takada-san, am I right?

Your paper company's location was right near Funabashi Shopping Plaza.

In the parking lot there

you were meeting with the buyer of the smuggled diamonds.

There is also footage of you increasing the water stream to hide the scratch on the tank.

It was perfect.

But why...

Thanks to the diligent work of my team.

You were calm with her disappearance

and you felt no guilt

for what you did to her.

It wasn't supposed to be like this!

It was a sudden impulse.

I needed money for traveling to Australia.

So I helped a Russian buyer.

I told him it was a one-time deal.

But he wouldn't let me leave.

Kazumi found that out.

There's no way I could go to the police.

But what you are doing is a crime.

I told you it's only until we go to Sydney.

And then I will start from scratch.

Please turn yourself in.

Atone for your crimes.

I will wait no matter how long it takes.

No way.

What will you make if you go to Sydney like this?

Let go of me!

Aquarium of a criminal?

What did you say?

Aquarium of a criminal?

I did it all for her!

I did it so I could make aquarium and live happily with her!

She showed no gratitude!

She didn't understand a thing!

How good the fishes here are.

No envy, jealousy, or resentment.

They're just going with the flow.

How about you become a fish when you're reborn?

Nah. That's a disrespect to the diligent fishes.

At best, not in here.

Suffer in the hard and cold concrete.

Kimi Ichiro.

You're under arrest for murder and abandonment of a corpse.

"Come to Yokohama Sando Shipyard at 11:00 pm if you want to know the true nature of Niina."

"Niina Masayoshi"

Is it true that you found the evidence?

We kept an eye on her and continued to follow her just like you said.

And it turned out...

This is the evidence.

Right after she left the pub.

Nariai-san.

You are alive?

Why did you never show up?

Your sister Takako-san was murdered!

So it was you who he saw that day?

What are you trying to do?

You know Niina's key, don't you?

That key was what your father entrusted to me.

Niina snatched it from me.

I know.

Do you know where that key belongs to?

No.

I have very few memories of my father because of that incident.

It's unfortunate.

I'm sure your father would have entrusted it to you.

What is this about?

You called me out here.

Does Mako-san know about this?

You have every right to distrust me.

But many lives are at stake.

That's all I can say for now.

What?

Find out where the key belongs to.

And your memories will return.

Put down your chopsticks and get prepared now!

Calm down, Niina.

The river always flows out to sea.

The river always flows out to sea.

There is no point in rushing.

I will be not rushing.

She was on a call with Nariai.

Kimi is under interrogation.

Whether or not the diamond smuggling was done at the direction of Negishi Nayu.

And there is someone behind her ties to a criminal organization.

All right, keep following the river.

Next stop is the sea.