Based on the novel by Kazumi Takahashi. - Murase is a bodyguard in a yakuza group. Ochiai is a police officer who once was a student activist. When they meet, they are surprised how identical they look. They decide to trade places with each other. Murase investigates the case he was involved in. Ochiai feels rather comfortable in the world of yakuza. They begin to feel sympathy for each other...