When Lord Tadakazu died without leaving an heir, the Shogun himself took responsibility for dividing the lord's holdings. Mysteriously, an entire fortress was given to Lord Otomo, a rival of Tadakazu, with the provision that he personally take possession of the structure.

When Usagi discovers that the Neko ninja plan to attack Lord Otomo, the rabbit ronin believes this strange gift may be part of a plot to assassinate the lord. Yet no ninja assault can compare to the surprise that awaits Otomo within the walls of his old enemy's fortress.