 After an attempt at installing a door with mishaps galore, the boys are recruited by the police commissioner (Bud Jamison) as police officers.The head of the citizen's league, Mr. Dill (John Tyrrell), warns the police commissioner that he must capture the "Ape Man", a criminal wearing a gorilla suit, that is terrorizing the city, or he will have his job.The boys get a tip that the Ape Man is burglarizing a particular store and head out to catch him.