The director of a detective agency discovers a jewellery thief likes to attends the theatre. So he hires two clumsy and bumbling detectives to guard all the theatres in the area. The two investigators now go from one venue to another attending various Italian magazine shows.

A ruthless businessman wants to bring a penniless nobleman financially on his knees because he wants to marry the man's daughter. It is the family chauffeur who puts things right.

During Fascism and after WWII, a school porter sacrifices himself so his son, who is slightly ashamed of a lowly background, can become a respected professor.The film also takes a few jabs at Italy's rapid governmental reshuffles.