Tokugawa Ieyasu clashed with the Toyotomi forces during the Winter and Summer Sieges of Osaka and defeated them. However, he discovered that his most feared enemy, Sanada Yukimura, was still alive, and ordered the Koga ninja to subjugate the Sanada clan. Meanwhile, Sanada Yukimura was plotting to restore the Toyotomi clan with the help of the Makaishu, a clan of terrifying psychics mentioned in ancient documents. Yukimura and his party ventured into the mountains of Hida, where the Makaishu were hiding, but... Yokoyama Mitsuteru's masterpiece sci-fi period action!