Totonou Kuno (Masaki Suda) hit his head in the bomb demon incident. He wasn't traumatized and had nothing to do with it, but he was admitted to the Onei General Hospital for inspection just in case. Yuto Ikemoto (Matsuya Onoe), who knew the situation, advised Nariaki Aoto (Michitaka Tsutsui) that he could have the hospitalization fee because he cooperated with the police. If Aoto permits, Seiko Furo (Sari Ito) goes to the hospital for the procedure.When Sei, who had shopped at the shop, returned to the hospital room, he received a small baggage with his address and the client's name. When she opens a box she doesn't remember, she finds dried flowers and a letter inside. From the text of the letter, I noticed that the arrangement was from Inudogaji (Eita Nagayama), and when I changed the box while being wary that there was something wrong with it, something fell. When Sei was looking for it, the bath light came. Bath light was upset by the ring that Sei picked up, and handed over her procedure form and returned immediately.That night, when Sei was about to go to bed, an old man in the next bed called out. The old man calls himself Goro Ushida (Fumiyo Kohinata) and says he is a retired detective. Then, Ushida talked about the case he was in charge of with his partner detective, Shinji Shiratori (Kazuyuki Aijima). Ushida does not talk about the resolution of the case, but solves the mystery as a problem. Reluctantly, Sei answered the second question perfectly.
The third question is about an unsolved case in which women who prostituted 22 years ago were killed one after another. At that time, the suspect was identified as Gento Hagoku, but he was not arrested. At that time, a woman who was being targeted by a feather eater contacted the police to ask for her protection. Ushida heads to the place designated by Shiratori and the woman ...

Guided by Leica (Mugi Kadowaki), Totonou Kuno (Masaki Suda) began investigating a strange arson murder case. Then, in the family of the dwelling that was set on fire, the parents died and only the children were saved. In addition, from information such as Seiko Bath Mitsu (Sari Ito) and other police, Sei confirmed that there is an urban legend site about 'Angel of Fire' in which an abused child asks for the killing of his parents. And Sei learned that Ryota Shimodo (Amane Okayama) also lost his parents in a fire caused by arson. However, on Christmas Eve night, Rikuta called him to help with the event held at the Onei General Hospital, and he was attacked by the warehouse. The warehouse also detained the parents of a child who was hospitalized and suspected of being abused.Two days before that. Naruaki Aoto (Michitaka Tsutsui) and others investigating the arson murder case could not be arrested due to insufficient evidence in a similar case that occurred three years ago from the mark of the flame left on the scene. It was decided to wash Kaonto Taihara (Taichi Saotome). Kaonto was eventually arrested for a fire of about Boya, and she was released half a year ago after serving a medical juvenile training school, but she couldn't get a foothold after that. However, on the night of Eve, Aoto and his friends find out that Tsubasa Washimi (Yuki Imai), the manager of an urban legend site dealing with the arsonist 'Angel of Fire', was also a child who survived the arson murder and headed to hear the situation.Around that time, Sei succeeded in reversing the situation with Rikuta's weaknesses. When asked if he was an 'angel of fire,' Ryuta replied that he was his senior, not himself. When Sei asked him to meet his senior, Rikuta took him to a room in a certain building and met him with Kanon. Sei will hear the relationship between Rikuta and Kanon and the truth of the arson murder case.