On the surface, Su Wan is a gentle psychological counselor, but secretly he is an international criminal psychology consultant who specializes in treating all kinds of disobedient high-IQ criminals. The new criminal investigation captain Gu Shen is an irritable and straight man who quarrels with her every day. Until a serial murder case tied the two together - the murderer left a psychological puzzle every time he committed a crime, waiting for Su Wan to solve it. Gu Shen found that this soft-looking psychiatrist was more ruthless than him and crazier than a criminal. The two were fighting each other while solving the case, from tit-for-tat to teaming up to torture the scum. But when all the clues pointed to Su Wan's former mentor, her hidden identities were revealed one after another...
