Cen Jianxun and Richard Ng's films.

Synopsis: The gangster Xia Zhengyi [Chen Long] smuggles and sells drugs, commits many evils and becomes rich overnight. Although the police are well aware of their misdeeds, they lack evidence, so that they can't be brought to justice at the moment. Xia has a ledger that records all his illegal activities, which is kept by his mistress. The anti-gang members who were ordered to investigate were Beethoven [Cen Jianxun] and A Qiu [Richard Ng]. When they were handling the case, they caused a series of jokes and were reprimanded by their superiors. Anna [Ye Dexian], a senior policewoman, has a soft spot for Ah Qiu. With her help, they found an informant, Uncle Wen [Taibao], who visited Xia's mistress in the evening. Unfortunately, they came late.