A single samurai that continues his bloody fights on the battlefield.
His name is ZAN.
He was on of the 12 divine generals that served under the Divine Guardian of the Light amidst the endless battle between the gods of light and dark in a different world. However, he was cast out from the world of the gods after a betrayal and had lost his memories. Lost on his path and continuing his mindless slaughter, he meets a mysterious girl on the battlefield. From her he learns of his identity and that unless the Divine Guardian of the Light is released from the captivity of the army of Dark the world will be erased to nothing.
ZAN takes off to journey to a world beyond this dimension to regain his memory and the world of light.