Two sword-smiths were called by the emperor so that the entire land would learn who was the best sword creator in all the land. One of the sword-smiths created the sword to cut no man but to cut right through the other sword-smiths blade thus winning the duel of swords. Angered by this the other sword-smith created the Forbidden Arms which is a weapon of dark magic that can only be created by sacrificing your only son. This sword will drain the life of any holder because of its demonic magic. For some reason you get to play as a samurai that gets to kill ninjas with the sword.