Supernatural revival unleashes beasts from the Classic of Mountains and Seas, leaving cities on the brink of destruction. Kai Chen builds an aquarium, only to be trapped inside. He discovers it possesses extraordinary powers. Bitten by a Kun Peng, Chen forms a Beast Contract Bond, gaining its power. He joins the Alien Beast Authority, fighting beast tides. He averts the apocalypse, evolving into a savior Beast Tamer guarding the human world.