The story follows the male protagonist, who travels to the world of phantom beasts and uses his powerful spiritual energy to form contracts with four phantom beasts: the Azure Dragon, White Tiger, Vermilion Bird, and Black Tortoise. Together with his adorable companions, he battles across the phantom beast world. Every time the protagonist grows stronger, his phantom beasts evolve alongside him, eventually transforming into the Four Great Divine Beasts of ancient China and allowing him to dominate the phantom beast world.