INT. SCHOOL. MORNING

Meiji: So yesterday was a busy day for you.

Kenji: Yes, but what I don’t understand is why he tells us that he is disguised as these characters.

Meiji: What?

Kenji: Yes, when we quickly went to the bathroom, he left us a message telling us (Be prepared for the next time, I don’t think you will fail.)

Meiji: So he wants to challenge you.

Kenji: Yes.

Meiji: What did he leave you in the first message?

Kenji: He left us a message threatening to kill the head doctor, Nyamu Keiichi.

Meiji: Did you tell him?

Kenji: No, the content of the message was (I will not be away from you for long, as soon you will hear the news of the death of Dr. Nyamo Kechi.)

Sera: Kenji, did you know that a strange message arrived from Dr. Nyamo Keiichi?

Kenji: What? What does it include?

Sera: I don't know about colons and dashes.

Kenji: What?

Kenji rushes out.

Meiji: Where to, class will start.

Kenji: I stipulate that the message be from the killer and include the time and place of the crime in Morse code.

Sera: What??

Kenji leaves school.

INT. BEIKA'S HOSPITAL. MORNING

Nyamo Kechi: The message includes (.---- ... . .--. )

Aya: What?

Takagi: I think it's Morse code.

Kenji: September 1, the crime is on this day.

Nyamu Keichi: What crime?

Kenji: You're in danger, you're the next target.

Nyamu Kechi: Why didn't you tell me?

Takagi: Because he will be disguised as someone around you.

Kenji: Everyone around you is accused.

Aya: You will be protected in the following days, do not be afraid.

INT. SCHOOL. MORNING

Meiji: I feel weird about this case.

Sera: Do you think Kenji is safe?

Meiji: Of course.

Aiko: Sera, focus on the lesson.

This day went well, but the next day, which was August 30th.

INT. NYAMU'S HOUSE. AFTERNOON

Policeman 1: Come let's eat. The crime will happen tomorrow, not today.

Policeman 2: Are you sure?

Policeman 1: Yes, come on.

Policeman 2: Oh, okay.

They went and after they returned, they discovered the body of Mr. Nyamo Kechi.

After half an hour:

Aya: It is strange that the criminal has never made a mistake on the specific date of the crime.

Takagi: Yes, how? Did that teenager make a mistake in translating?

INT. MAKOTO'S HOUSE. ATERNOON

Takagi calls Kenji.

Takagi (on the phone): Detective, come to the doctor's house.

Kenji: What?? did he die?

INT. NYAMU'S HOUSE. AFTERNOON

Aya: Why did you stay away from here? Why did you stay away from guarding him?

Takagi: You gave the killer a chance to carry out his plan.

Kenji: What happened?

Takagi: Oh, what happened? Either you made a mistake in translation or we were deceived.

Aya: But there is something that even if he wants to deceive us, he will not miss his appointments.

Kenji (thinking): He didn't cheat at the time.

Takagi: Let's check the house.

Kenji: Did you find a letter from him?

Aya: What???

INT. MAKOTO'S HOUSE. AFTERNOON

Aki (thinking): I'm sure he's not the killer, someone took advantage of this message, but who is he? The only people who might know he's in danger are his wife, his brother, and the police. The only suspects are his wife and brother.

Rin: Darling, what are you thinking?

Aki: Oh my love, there has been a second crime, Doctor Nyamu Kechi.

Rin: But didn't Kenji tell us that the date is September 1?

Aki: Yes, that's why I'm sure that the killer is not the dark man.

INT. NYAMU'S HOUSE. AFTERNOON

Kenji (thinking): If the killer is not the dark man, who might it be? The ones who will know about the message are his wife and brother.

INT. MAKOTO'S HOUSE. AFTERNOON

Ren: Who benefits from the doctor's death?

Aki: I think it's his brother because he will inherit his profession. What?

Rin: Then why couldn't he be the killer?

Aki: I have to call Kenji.

INT. NYAMU'S HOUSE. AFTERNOON

Kenji (thinking): But the only beneficiary will be his brother.

Suddenly his mother calls.

Kenji: Oh mom, hello it's me.

Aki (on the phone): My beloved, the murderer is the one who benefits from death. I hate his brother.

Kenji: Yes, we will invite him here.

Kenji hangs up.

Takagi: Who were you talking to?

Kenji: Call his wife and brother. I knew who the killer was.

Aya: What?

We called them and they came.

Nyamu Akemi: My husband, no, my love.

Aya: So who is the killer, Detective?

Kenji: You'll see now.

INT. MAKOTO'S HOUSE. NIGHT

Rin: But why did the Dark Man want to kill the doctor?

Aki: We don't know?

Rin: Is it for the same reason?

Aki: No, definitely.

INT. NYAMU'S HOUSE. NIGHT

Kenji: So, Mrs. Nyamo, you are the only one accused of killing your husband.

Nyamu Akemi: What, no, not me.

Kenji: Yes, all the evidence is directed at you.

Aya: What evidence?

Takagi: Speak?

Kenji: Aren't you the one who will inherit his work?

Nyamu Akemi: No, it's Nyamu Kogoro. He is the heir.

Kenji smiles.

Nyamu Kogoro: Ahhh.

Nyamu Akemi: I was the one who killed my husband.

Aya: What? But why?

Kenji: You are not the killer. The estimated time of Mr. Nyamu’s death is between four and four-thirty, and at this time you were seen with your children in the public park.

Takagi: Only you remain, Mr. Nyamu Kogoro.

Nyamu Kogoro: I'm not.

Kenji: Don't you have a reason to kill him?

Takagi: You will inherit the management of the hospital.

Kenji: And there's something else, but he's the one who will tell us.

Nyamo Kogoro: I killed him. I killed my brother. He stole my fiancée from me.

Nyamu Akemi: Kogoro.

Nyamu Kogoro: He also stole my work from me, he's not worth living.

Kenji: You knew that he was the one who killed him, and you would have sacrificed your life for him.

Mr. Nyamu Kogoro was imprisoned and confessed everything at the police station, but what puzzles me is why the dark man wanted to kill the doctor...