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.
Marcello Cenni, qui vient juste de rompre ses fiançailles, rencontre à Rome Anna Padoan et c'est le coup de foudre. Mais Anna doit bientôt partir à Capri où elle est engagée pour tourner un film et il est convenu que Marcello la rejoindra dès que possible...
Maria, is a girl raised by the loving care of a poor couple but without knowing anything about her real parents. She is in love with Giorgio, a boy from a good family, who however has also aroused the interest of the intriguing Edvige who frequents bad company including jealous Roberto.