In the continuing adventures of Nemuri Kyoshiro, noted film actor Tamura Masakazu stars again as the red-haired ronin with foreign blood in his veins. The son of a foreign missionary and a samurai's daughter. His mother died when he was a child, and he was forced to bury her himself, praying that her soul would rest in peace. He became an expert at swordsmanship, despite being in the shadow of isolation and nothingness, and walks the bloody path of destruction carrying his only friend, a razor sharp sword made by the Master, 'Peerless Masamune' to go with his unique Full Moon Sword style. After being accused of being a government spy, he falls ill and accepts the aid of a prostitute who nurses him back to health. As he prepares to leave the Chief Retainer of the Akita Clan asks him to help save the clan from an evil plot. Kyoshiro's deadly full moon cut will have to come into play against many who seek his life!