With war against Korea looming on the horizon, Toyotomi Hideyoshi, the 'Taiko' becomes the target of an assassination attempt to be carried out by the Iga Clan of ninja spies. Master spy Tsuzura Juzo (Otomo Ryutaro) is assigned the task, but first he must defeat a former Iga spy who has become a traitor, and outwit the treacherous woman that is trying to seduce him.