Sergeant Kwok Wah (Andy Lau) and Ho Lung (Ray Lui) are both colleagues and best friends. Ho Lung killed by a gang leader( Dick Wei) after Hung (Cherie Chung) is used as bait to lure him to a room. Sworn to take revenge for his best friend, Kwok Wah works with Ho Lung's partner Mother (Kent Cheng) to unveil the enemy. Kwok Wah saves Hung during an operation and Hung starts to like Kwok Wah. Kwok Wah and Mother follow their plan to capture Dick, but it ends in vain and both of them get into a gunfight. Hung is killed for saving Kwok Wah during the gunfight. Though heart-broken, Kwok Wah and Mother go on fighting the villain...
Slightly above Average HK crime thriller which is thoroughly watchable with a mix of comedy and cop/action, though there's lack of the latter. Most of the plot is taken up by the scheme to bring down the gang leader, and of course, some romance. One of the reasons this is decent film is helped by the performances by Cherie Chung, who is excellent as a drug addict informer, and the likeable Andy Lau. Their chemistry and interactions are quite good. The ending is quite sad, contrasting greatly with the mainly breezy/comic feel.