When Totonou Kuno (Masaki Suda) is enjoying making curry, he receives a call from Seiko Furo (Sari Ito) on his smartphone. She responded with an unpleasant premonition, and Yumitsu wants her to help solve the mystery of the incident. It is the identification of the bomb threat location posted on the dark site. The ciphertext of the alphabet is added to the notice, but police officers cannot clarify it. It was posted yesterday that it was set up in Shinagawa, but fortunately the building written in the notice was identified, so the bomb was discovered and the attempt ended. However, there was a notice again, and this time it was set up in the jurisdiction of the Ohtonari station, so Yuto Ikemoto (Matsuya Onoe) turned to Furo Hikari to ask for cooperation.At the reception of the bath light, I went to the interrogation room again. This is because the cooperation of investigations with civilians cannot be known to Nariaki Aoto (Michitaka Tsutsui) and others. Sei solves the mystery of yesterday's ciphertext. At that time, there is news that the second bomb was found. Sei is praised by Furo Hikari for his ability to break the code, but something gets caught. Meanwhile, the suspect was identified from the address posted on the dark site, and the suspect was interrogated but denied the crime. Ikemoto and Furo Hikaru are convinced that the suspect is almost black, but Aoto suspects that he is not wet because the address can be easily identified.The next day, the third notice was posted as Aoto was concerned. Sei who doesn't know such a thing goes out to eat in the rain. Then he was approached by a stranger (Tasuku Emoto). After having a conversation for a while, Sei finds out that the man has lost his memory.

Totonou Kuno (Masaki Suda), who is admitted to the Onei General Hospital for inspection, goes to the greenhouse in the hospital on the night before discharge, guided by the code hidden in the hospital bulletin board. There, Sei met Leica (Mugi Kadowaki), who conveys words with numbers that combine pages and lines of 'Self-reflection'. Leica, in numbers, disappears by instructing him to come back to the greenhouse at 3 pm the next day.
The next day, after completing the discharge procedure, he went to the hospital restaurant to have lunch until the time specified by Leica. Then, he collides with the patient Ryuta Shimodo (Amane Okayama). I apologize for the adjustment, but Ryuta has a difficult habit and does not forgive. However, Ryuta was frustrated and left when he calmly returned it.At 3 o'clock, when Sei went to the greenhouse, numbers were written on his floor. When I checked it in 'Self-reflection record', it was in the soil of a certain place. When Sei digs there, a plastic bag containing something comes out. At that time, the scream of a woman who stands still. She is Manami Umezu (Atsuko Anami) who manages the greenhouse. The plastic bag was filled by Manami for some reason. After hearing from Manami, Sei solves her worries. Sei, who broke up with Manami, found an envelope pinned to the trunk of the cherry blossoms. When the Leica number to look inside was opened, there was a picture of a wall with graffiti on it. The graffiti looks like a flame-like mark. The address was written on the back of the photo.When Sei went to the address written in the photo, the house seemed to have burned down. Sei found Rikuta among firefighters, police officers, and rubberneckers. Rikuta, who knew that he was being seen in a regular manner, disappeared with Kaonto Ihara (Taichi Saotome) who was talking. Then, before I knew it, there was Leica next to Sei ...