Kuryu Kohei returns to Tokyo Prosecutor's Office once again. There are familiar faces, but also new faces who will be working with him this time round. One of them is paralegal, Asagi Chika, who is now in charge of going along with Kuryu's whims.

Harumi Hagiwara lands in the hospital after being involved in an accident. She hits it off with her nurse, Reiko Nishimura, and the two decide to move in together after she's discharged. However, Harumi begins to witness a series of mysterious events soon after noticing Reiko's strange behavior. Additionally, she fears for her own safety when Reiko starts referring to herself as 'Mari' as if she's become an entirely different person. Before long, the situation develops into a case of murder.