A family murder and a powerful dagger set young Jiro on a course to unlock the mysteries of his past in this anime film. After he discovers that his family has been brutally murdered, Jiro is blamed for the killings and flees his village. Bishop Tenkai takes him in and has his subordinates, Shingo and Sanpei, train him in the ways of the ninja. But all is not as it seems, as Jiro discovers Tenkai's true identity.