With a sharp katana in hand and daunting scars from a scythe on his back, Shurannosuke Sakaki is a masterful samurai, unbound by a master and possessing a cold exterior. The Nakura Clan recognizes his exceptional sword-wielding skills and enlists his help in the dangerous mission of rescuing Princess Mayu from the vicious Seki Ninja. In the face of the Ninja's skilled fighters, Shurannosuke must use his intelligence and agility to pass the ultimate test.