The story is about a fisherman's family living near to Shanghai. In the beginning, twin babies are born, a boy and a girl. Their growing-up is briefly sketched, and their friendship with "young master", a boy from rich family about their age.

A gifted criminal profiler, Fang Mu was asked to assist the police in solving a bizarre campus serial killing. Working together with Police Captain Tai Wei, Fang Mu tries to crack down the murder cases, but he unknowingly gets embroiled in a battle of wits.