Once a renowned high school known for its martial arts prowess, Hakuo Gakuin faces a decline as its top students are being poached by rival school Seishikan. To turn the tide, the interim principal, Hojo Himeko, dispatches Yagyu Ranko to seek help from the legendary Fuma ninja clan in Fuma Village. The Fuma leader sends Kojiro to Hakuo, where he clashes with the formidable Yasha clan, loyal to Seishikan's leader Asuka Musashi. As Kojiro's allies join the fray, a long-awaited ninja conflict between the two ancient clans is reignited after a 500-year hiatus.