In the Warring States era, the demon ninja army led by the demon lord Deibosu threatens the realm. Taking up his master's final wish, Jinnojo transforms into the heroic Shiomaru using the power of the sacred sword "Shishi no Tsubasa." Together with the kunoichi Sagiri, he battles Deibosu's demonic ninja assassins, traveling across the land to save the war-torn age. Deibosu's underlings, including the Poison Spider Monster Gumo, the Mad Ape Monster Zarura, and the Poison Flower Monster Bana, attack with ruthless tactics targeting Sagiri. The kunoichi is subjected to brutal torture, enduring extreme humiliation and suffering. Pushed to the edge of despair, her rage reaches its peak, ultimately leading to a HAPPYEND.