As the Shogun lays dying, seventeen Iga clan ninja are sent to infiltrate the impenetrable fortress where his youngest son is preparing to storm Edo Castle and name himself Shogun…

Four ninja are hired to fight against the Shogunate’s plot to abolish the Gamo Clan, the regional barons struggling to reinstate their young heir Tanemaru as their Lord.

Ichi is staying at an inn when a woman dies. Her dying wish is that Ichi take her son to his father, an artist living in a nearby town. After…