Ten years after the war between the Iga and Kouga ninja clans ended, their heirs want something other than another feud: Kouga's Hachirou and Iga's Hibiki hope for peace and a life together, carrying forward the bloodlines of Gennosuke and Oboro. The decade-old truce cracks when a mysterious schemer named Jojin sets Tadanaga, the shogun's brother, against the shogunate, dragging both clans back into ninja warfare. This series is a direct sequel to the original Basilisk, set a decade after its ending.