Tough cop Ken Li (Ekin Cheng) is at the top of his game but still needs some help to solve a grisly crime that the offender, a respected police officer, doesn't even remember committing. Li seeks out Jack Lai (Leon Lai), a former psychologist, now disgraced and behind bars, who possesses an uncanny ability to bend people to his will. Forming an uneasy truce, this unconventional duo sets out to find the man responsible, a master hypnotist who will stop at nothing to exact his revenge.