Hakuo Gakuin, previously renowned for its martial arts program and prestigious status, is now in decline due to the cowardly actions of its rival, Seishikan. As a result, Acting Principal Hojo Himeko sends Yagyu Ranko to the Fuma Village to seek assistance from the famed Fuma ninja clan. In response, the Fuma leader dispatches Kojiro to Hakuo, where he must confront the formidable Yasha clan, loyal to Seishikan's Asuka Musashi. With the arrival of Kojiro's fellow ninja, a 500-year long conflict between the two clans erupts into a full-blown battle.