Impoverished student Fang Wen accidentally activated the "Biological Experience System", and can obtain financial rewards by possessing animals and spending their lives. In order to pay off the tuition debt raised for him by the entire village, he transformed into a fly and a carp to earn his first pot of gold. Since then, he has transformed into a hound to repay the hunter and help the police solve a case; possessed a cat boss to smash a cat-stealing gang; transformed into a peregrine falcon to accompany his benefactor to the top of the imperial examination; and even transformed into a Tibetan macaque to unify the Emei monkey troop. After going through several wonderful "beast life" experiences, Fang Wen not only punished evil and promoted good, but also accumulated tens of millions of funds and a huge monkey troop. In the end, he built a private zoo in his hometown, completing a magnificent transformation from a debt-ridden youth to leading the entire village to get rich.