In the prehistoric world of Middle-earth, three major cultivation sects each guard one side. They were originally united to resist the demonic sect, but a gap was created due to an innocent heavenly book. The Demonic Cult took advantage of the opportunity and invaded the Middle Earth, causing a bloody storm. Later, Buddhist masters sacrificed themselves in exchange for the retreat of the demon sect, but they also left behind a prophecy: there will be a greater catastrophe in five hundred years. If the reincarnated soul boy cannot be found by then, the entire prehistoric world will become a mountain of corpses and a sea of blood, with no one spared.