In Keicho 19, after the Osaka winter campaign between Toyotomi and Tokugawa ended, there were two strange samurai heading for Edo along the Tokaido. The purpose is to secretly investigate Edo Castle, where Tokugawa Ieyasu established the Shogunate. Those two people are Sasuke Sarutobi and Nyudo Miyoshi Kiyomi. At an inn on the way, the master tells them that a man named Kanbei who has drifted to this area is extremely evil, and asks them to somehow get rid of him...