Gao Yang is an orphan. At the age of six, he traveled through to a "parallel world" and has since lived in a warm family of five. When Gao Yang was eighteen, he accidentally discovered the truth of the world: this is not a parallel world at all, but a mysterious realm, and the relatives and friends around him are all terrifying "beasts"! Gao Yang, who discovered the truth, was almost killed, and at a critical moment, he obtained the system [Lucky] - the longer he lives, the stronger he becomes! A fierce game of slaughter between the lamb and the wolves thus begins...