Once every 333 years, an unspeakable monster awakens - a creature named Kuiba - whose sole purpose is to bring havoc upon the world and serve as the bane of all existence. In the year of Kuiba 1664, the sixth iteration of this vile being emerged. Fleeing a preemptive attack by the celestial forces, the young Kuiba - who was simply known as Manji - found refuge with Man Xiaoman, the leader of the Beast Nation, who raised him as his own without knowledge of his true identity. Thanks to his adopted father's support, Manji passed endless tests and eventually boarded a ship bound for Maelstrom Island, determined to prove himself the greatest Spirit Warrior of them all by stopping the menace that was Kuiba. Nevertheless, upon his arrival, Kuiba's most dedicated henchmen awaited, ready to battle anyone who dared stand in the way of their leader's return. Despite his ignorance regarding his heritage, Manji must soon confront the inevitable clash between his father, the gods of heaven, and Kuiba's twelve most menacing lackeys.