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...

Chan Wing Yan is a hard-nosed veteran cop sent undercover to infiltrate the notorious Triad crime ring. An expert at bringing down violent syndicates, Chan thinks it's going to be a routine mission. What he's not prepared for is the discovery that the Triad's boss has planted a mole in the police department-and now Chan is being hunted down. In a battle of wills, only one cop can win!

In the third installment of the serial, officer Lau must contend with a marriage on the rocks, an internal investigation and a young cop who reminds him of himself. The pressure and fear of his identity being exposed, leads him to consider a new life.