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.

A criminal psychologist and a forensic expert works together to track down a serial killer who targets people who have been acquitted of notable crimes and uses their guilt as his modus operandi.