 The stooges are carpenters who become policemen. A mysterious burglar disguised as a gorilla has the cops baffled and Mr. Dill, the head of the citizens league, threatening the police chief s job. The boys go on the case and pose as night watchmen at an antiques store. They confront the crook, who turns out to be a real gorilla owned by Dill. After defeating Dill and some other bad guys in a wild fight, the gorilla drinks some nitroglycerin and blows up.