Makoto Ashikawa

Detective Nishi is relieved from a stakeout to visit his sick wife in hospital. He is informed that she is terminally ill, and is advised to take her home. During his visit, a suspect shoots one detective dead and leaves Nishi's partner, Horibe, paralyzed. Nishi leaves the police force to spend time with his wife at home, and must find a way to pay off his debts to the yakuza.

Shamoto runs a small tropical fish shop. When his daughter Mitsuko is caught shoplifting at a grocery store a man named Murata steps in to settle things between the girl and the store manager. Murata also runs a tropical fish shop and he and Shamoto soon become friendly. However Murata hides many dark secrets behind his friendly face.