As a Senior Inspector of the Narcotics Bureau Operation Unit, Gordon Heung (
Michael Miu) profoundly abhors evil. He and Wai Sai-Lok (
Raymond Lam) – Senior Inspector of the Intelligence Unit – have closely co-operated with each other as peer mentors, frequently solving drug trafficking cases for the Police Force. During an operation to knock down the targets, Sai-Lok discovers clues that Gordon is most likely the corrupt cop in a collusion conspiracy with drug dealers. Apart from launching a secret investigation into Gordon, Sai-Lok is also alienated from him by the evil-willed Chief Inspector of the Operation Unit – Brian Poon (
Ben Wong). Having undergone various disputes against each other, the long-term brotherly relationship between Sai-Lok and Gordon appears full of contradictions. Meanwhile, following an investigation, Sai-Lok falls in love with a snitch – Pat Chan (
Kate Tsui), who suffers from low self-esteem due to her humble beginning. Deliberately denying her affection to Sai-Lok, Pat gives up on him so that his secret admirer – Sandy Ko (
Ella Koon), a rookie police officer – can have the chance, leading to a subtle relationship among the three. Feeling life is so dreary, Pat ultimately digs her own grave by becoming a new generation of drug dealers, involved in drug trafficking and provoking the police force. With intense sorrow, Sai-Lok then joins forces with Gordon against Pat, waging a chain of bitter battles. ==Production==