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.
The Milanese Luigi Pizzigoni, photographer, and the Neapolitan barber Peppino Avallone, resident in Milan, are opponents in the sports field. The first is a proud Inter supporter, while the second is from Napoli.
The young Chiaretta has joined, against the will of her family, a theater company in the magazine in the hope of being able to sing on the stage. Her fiancé chases her trying to make her change her mind and bring her home.
Rather than renouncing his artistic dreams and working in his father's company, a young man, who is vocally equipped, is content to perform at street corners. This allows him to know and fall in love with a beautiful blind girl.
In a massive department store the driver romances the shopgirl. The problem is that the manager also has his eye on her, and some employees seem to be pilfering goods from the place.
