背景是一个黑帮新旧势力转换期，旧帮会老大因逃避警方而远走台湾，新帮会就乘机坐大，更欲取得帮会中的名册作巩固势力，肥豪一人到坤叔家里欲威迫坤交出名册。怎料坤早把名册资料输入电脑磁碟中，暗地交予老大的情妇清。坤夫妇更临危托孤，将独生女玲托清照顾。

Tough, oversexed Ching Tse and her pubescent cousin possess acassette of triad boss' names -- and a rival gang wants to get their hands on it. All would be hopeless if not for studly Sam, whose appearance is hardly accidental. The movie's climax is its sole justification: Sam switches sides and fights the enemy in a huge garage aided by a gang of good guys on scooters, while Ching rescues her cousin.