Their mission goes terribly wrong... Kagemawari agents Rikimaru and Omitsu travel undercover, rooting out treason and corruption amongst the daimyo. But a stop at a hot springs proves deadly; in her efforts to seduce Rikimaru, Omitsu fails to stay alert and they are ambushed. Just when their enemies are defeated, Rikimaru is struck by poison darts. Only Omitsu can save him now, using a secret--and erotic--technique of the kunoichi...