Beach Boy is a maverick cop whose unorthodox and incompetent ways are frowned upon by his uptight superiors. His inept partner Mr. Chow isn't much help, and is more concerned with taking care of his many, many children. On a routine stakeout, Beach Boy and Mr. Chow rescue a lovely Mainland girl named Ah Yuk, who was previously abused by her criminal uncle.

A woman looks to a cop for help against her abusive husband, who constantly rapes, beats, and belittles her and her son, but the husband catches wind of the cop's plan.