In the post-apocalyptic wasteland world, humans retreat to six bases and struggle to survive. Lin Zhao, who was originally just an ordinary survivor, unexpectedly awakened the "Beast Contract System" during the wave of mutations, and began his rise to symbiosis with beast pets. From signing a first-level fire fox against a group of wild dogs, to contracting a gold-level thunderstorm giant eagle to tear open the sky, to taming the ancient bloodline Chaos Beast King, he not only led the base to break through the mutated beast blockade, but also revealed the truth of the apocalypse while exploring the ruins of the old world - the so-called "doomsday" is just a testing ground set up by higher civilizations to screen "beast masters". When the bond between humans and beast pets breaks through the limitations of dimensions, Lin Zhao will eventually become the master of beasts across the stars.
