As a Senior Inspector of the Narcotics Bureau Operation Unit, Heung Wing profoundly abhors evil. He and Wai Sai Lok, the 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 Heung Wing is most likely the corrupt cop in a collusion conspiracy with drug
