Black Star and Tsubaki are assigned the task of tracking down and defeating Masamune, the Enchanted Sword, who has been devouring human souls. When they come to the village where the Enchanted Sword was last spotted, they are met with hostility from the villagers due to Black Star's heritage from the murderous Star Clan. Masamune later appears and possesses the body of a young boy, but Black Star breaks the boy free from the Enchanted Sword's control. At her own insistence, Tsubaki sends her soul into the Enchanted Sword to confront the soul of Masamune, who is in fact her older brother.