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.

Sei learns of the fact that Yoshikazu Miyoshi (Asami Mizukawa) was once killed by a stalker at a mountain lodge where a mystery party was invited by Haruo Tenda (Kosuke Suzuki). Not only Kiwa, but the stalker is also dead from the toxic smoke of oleander in the fireplace. Before coming to the mountain lodge, Sei said, 'There is only one person who lie to the participants, so please take a look.' Talk about what you were asked to do. Then, Furo Hikaru was told by the heavens, 'I want you to see someone who doesn't lie.' Sei and Bath Hikaru begin to wonder if there is something wrong with Kiwa's case.The next morning, the awakened participants shovel the snow. When Sei asked Tenda about Kiwa's case, Tenda replied that although there was no evidence of a third party's invasion, he had always felt uncomfortable about the case. And Tenda asks Sei, 'I just want you to see the situation of the meeting without prejudice.' At that time, Furo Hikaru noticed that several branches of Oleander were broken.After shoveling the snow, when Sei and Furo Hikari are cleaning up the tools in the garage, a power outage occurs and the electric shutter does not open and is trapped. Sei takes out a flashlight from the tent that Takakatsu Tachibana (Kuranosuke Sasaki) put up in the garage. Sei and others are released by having the heavens open the door leading to the mountain lodge. The cause of the power outage was that the power line was cut off by the weight of the snow. Restoration will take until the evening, so I will eat lunch for the time being, and Sei will be asked to make curry. I noticed that there was something about the arrangement of observing the participants.