In medieval Japan, a civil war is brewing. The despised Empress Hiroyo is challenged by Shogun Ashikaga, the only one who can match her troops. For the other lords, this means carefully weighing whose side they will support. And for the Shinobi, feared ninjas, spies, and assassins, this means their skills are in higher demand than ever to gain the upper hand in this fierce struggle for power and influence. This is especially true for the notorious Shinobi clan of Hideyoshi, who otherwise live in seclusion in the mountains - for they are surrounded by a very special secret...