In 1614, during the reign of Tokugawa Ieyasu, the ancestors of the two long-hostile ninja villages, Iga and Koga, made an agreement to maintain peace, not to interact with each other but to compete regularly to decide the winner. Oboro and Gennosuke, the individual heirs of the two ninja villages, met by chance without knowing each other's identities and fell in love, but a tragic fate was waiting for them both. In order to truly seize power, Tokugawa launched a political conspiracy to provoke conflicts and confrontations between the two villages and then eliminate the other's race. Each side sent five ninjas to fight. Each of the ten ninjas has unique skills and special superpowers. A life-and-death duel will begin. At this time, Oboro and Gennosuke will be forced to become enemies. The two must shoulder their family missions and duel.