Kubota Shu, who runs a temporary employment agency, is clubbed to death with a bat. A metal bat believed to be the murder weapon as well as something that looks like an old toy are found at the crime scene. Takakura Kiichiro, the commissioner of the Kyoto Prefectural Police, orders Takuma Yoshito to go to the crime scene. Takuma and the other members of the Special Investigation Unit begin the investigation. They learn that the old toy is part of a set of seven "Protect Kyoto" character figurines of different occupations which were made while Takuma was in the Kyoto Prefectural Police's Public Relations Division some 10 years ago. As Takuma and the members get to the bottom of the matter, they come to the least expected person. In addition, the shocking truth regarding Takuma's conviction is revealed.