Charley asks for his girlfriend's hand in marriage, but her father, the police chief, angrily refuses to allow her to marry anyone who is not himself a policeman. Charley then decides to join the police force, so that he can win her. But when he applies, he is rejected because he is too small. Charley doesn't give up, and he soon thinks of a way to avoid the size restriction - but simply joining the force is only the first challenge that he has to face.