In this imaginatively named sequel to the previous year's TO HOK WAI LUNG, Man-Tat Ng has been rewarded with a promotion to special operatives and Inspector Deannie Ip as his girl friend, Stephen Chow with traffic duty. When Ng tells him that his current assignment is undercover at a school where terrorists are threatening the student body, Chow quits and using fiancee Sharla Cheung's bridal money, hires his cohort from the last movie to likewise go undercover.

There are a lot of moving parts in this movie, but they all give way to various high-school antics, with Chow courting schoolmate Athena Chu, and occasionally pausing to beat up Ng under the guise of being beaten up by him. In fact, it's all grand fun and games, until the last twenty minutes, when the terrorists invade the school, and there's only Ng to fight them, which he does effectively.... for a while. How Chow mobilizes a tactical squad and performs general heroics I'll leave to the interested viewer to find out himself.