Ichi saves a small boy from drowning after he was knocked into a river by palanquin bearers. The boy reacts strongly when he sees Sabu's jitte as his father, Kisoya Genzo from Fukagawa was falsely accused of murder and arrested. Ichi returns the boy to his stepmother who thought he was dead. She said that she was praying for him, but Ichi is suspicious. The boy's uncle plans another attempt on the boy's life with the stepmother because the boy, Tarokichi, is the heir to the family store...