Fukka, the lord of Inuiyama's daughter, is determined to aid her father in winning the war and ensuring his safe return. However, being a girl, she is not allowed to fight in the battle. But when she hears about a fabled 'war ghost' called Byakkimaru, said to be around her town, she becomes curious. According to rumor, having Byakkimaru means winning the fight. To safeguard her clan, Fukka sets off on a mission to find this ghost.