The bloodthirsty 16th-century Japanese warlord Nobunaga Oda fears no one, except for the ninja warriors of Iga. The greatest of these stealth warriors is Mumon, who is also the laziest. His wife Okuni is constantly upbraiding him over their lack of money.
Now Oda’s son Nobukatsu defies his father, resolving to invade the land of Iga. Mumon, against his will, is drawn into an epic battle between the country’s most powerful army and the ninjas of Iga.
The fuse is lit for a battle the like of which has never been seen, as ninja square off against samurai.