This period thriller concerns a very famous cat known as the "monster cat of Nabeshima". This cat, a symbol of vengeance in human disguise, takes revenge for the death of its master as well as for the corruption in the feudal system.

One murky night, Soetsu, a blind acupuncturist and money lender, calls on Shinzaemon Fukami, a Hatamoto samurai, to collect some money. But Fukami is too busy having an affair with a maid and curtly tells Soetsu to ask Sawano, his wife, for the money. As they have no money, Sawano interprets her husband's words as telling her to give herself to Soetsu in lieu of payment. However, Fukami catches them in the act and kills them both. Snatching up Soetsu's money bag with 30 ryo in it, he then asks two ruffians, to sink the bodies in a marsh. From what follows, it seems as if the spirits of Soetsu and Sawano are still hovering on earth in anguish and anger. For soon afterwards, Fukami is found dead by his own hand and Osono, Soetsu's younger daughter, suddenly disappears from home.

Blind masseur Zatoichi is nursed back to health by a young woman after he is shot by a gang member. Zatoichi, who had come to the village to repay a debt, now feels further indebted. He commits himself to use his amazing sword skills to help the young woman's father, whose river-crossing service is under attack by the same gang responsible for Zatoichi's wounds.

Blind swordsman Zatoichi, jailed briefly, is implored by another prisoner to aid him in proving his innocence of a crime for which he is sentenced to death. Zatoichi is reluctant to get involved, because he knows how often such involvement has led to trouble in the past. But events conspire to thrust him repeatedly into involvement, and gradually he comes to believe in the man's innocence and determines to free him.

Blind swordsman/masseuse Zatoichi befriends a young woman looking for her father, a village leader who has disappeared. As he helps her investigate the disappearance, Zatoichi also becomes involved with another young woman who is trying to help her brother, who has murdered someone at about the same time and place as the missing man was last seen.

Ichi travels to the village of Itakura to pay his respects at the grave of Kichizo, a man he killed two years ago. When some tax money is stolen while in transit to the governor he is accused and sets out to find the money and clear his name.