Tim is an ambitious Narcotics Bureau chief inspector who puts his career above all else. Chao embeds himself in the depths of Hong Kong`s drug circuit as an undercover cop and barely resembles his former self. Wai is Tim`s loyal subordinate who hopes that one day he can gain others` respect through success. The three are life-long friends who would readily risk their lives for each other. But their new mission puts their brotherly bond to test.