In the Genetics Building in the early hours of the morning, the cleaners accidentally opened the iron cage in the secret laboratory while cleaning. In order to investigate the source of the bizarre python, Liang, a wildlife biologist, came to the genetics group where his ex-girlfriend Shiwen belonged to. When Shiwen took Liang to visit the company, he was attacked by a tyrannosaur, and everyone temporarily took refuge in the security house. Liang found that these so-called animals are "monsters" produced by mixed genes, so they not only have to escape the attack of Tyrannosaurus, but also get all the data of the gene group. The mutant tyrannosaurus is extremely ferocious. It not only has the size and brutality of a raptor, but also the camouflaging skin color of a chameleon. Liang found that although the tyrannosaur is fierce, it still has the weakness of the chameleon: fear of cold. Even so, Liang alone was still unable to fight against such a behemoth. All of a sudden, Liang came up with a way to use the mutated giant python to fight the mutated Tyrannosaurus, and find a breakthrough for himself to defeat the Tyrannosaurus....