A new cop gets baptized by fire when bank robbers kill her sweetheart and her senior in front of her and she fails to shoot back. She resolves to become hard and rough, then goes undercover.

Young friends (Jordan Chan, Moses Chan, Farini Cheung) look for happiness but find only fleeting pleasure in barhopping and one-night stands.

Five cops work and get on each other's nerves during a hot summer. Tak is a gambler, too much so for his girlfriend to risk marriage. Daddy, a single father, is harsh with his son who reminds him of the woman who abandoned them. Monk is mercurial, talkative, a show-off. Kong, a steady family man, keeps the peace. Sam is new, hoping to fit in and make it as a cop. Three brutal and murderous robbers are on the loose, and so is a former soldier, embittered over the loss of his pension, using very real bombs to extort what's due him. It's a dangerous job, and the cops must watch each other's back, regardless of their personal problems.

Sky is the king of the underground car racing circuit. After winning a hard-fought race, Sky is set up by his archrival Tang Fung.