In the elevator of a certain building, Kanagawa Prefectural Assembly member Kushitetsu Akira (Miichiro) was shot to death.Posted on the wall is a statement from a prisoner who calls himself Reiwa Rat Man, saying that this man was one of the bad guys who killed many people in the Goya Tunnel collapse accident 10 years ago. I will carry out divine punishment on behalf of the law.Kuroba Miko (Shinohara Ryoko) showed interest in this incident, but Morino Toru (idiotism) said that it was "not within the jurisdiction".In addition, Morino also discussed with Meiko and said that she wanted to give gifts to women.

A few days later, Nabeura Kozo (Yota Kawase), the president of Nabetori Construction, was murdered in a hotel room in Tokyo.There is also a criminal statement of “Reiwa's Rat Man” posted there.There are rumors that Nabeshima Construction was the company that contracted the Gangya Tunnel project. Nabeshima sent a huge bribe to Kushitetsu and won the project, but the collapse accident occurred because of jerry-rigging and material changes.

At this time, freelance reporter Shin Masaki (Nomura Shuhei) appeared and had a dispute with Junpei Sakai (Ryosuke Ajigata) and others for the interview.And the strange thing is that Xinzheng also knows the information about Reiwa's Rat Man% that the police has not released to the public.Morino investigated Xinzheng and judged that Xinzheng was a dangerous person with a strong sense of justice.At this time, Morino met his niece Akane Kihara (Ruka Matsuda).But in fact Akane and Arata are lovers.