Hiyori Makino is a rookie detective who is passionate about her work. One day, a video clip depicting a person being burned alive, is posted on the internet. Investigators believe this is a copycat crime of a murder that took place 5 years ago.

Hiyori Makino visits ex-detective Soichiro Natsume who investigated the case 5 years ago. Soichiro Natsume lives is at a share house where only ex-police officers can live.