Polish countess Lady Eva is the authoritative signature of the correspondence of an Italian women's magazine; behind the fascinating name hides a Roman girl whose advice will create a series of tangled and comic situations.
Music, ballet, folk dances and mime eliciting the spirit of Naples across the ages are loosely tied together by the comedic wanderings and exploits of the Esposito family.
Leo (Vittorio De Sica) is young man trying to make a living without any success. Through fortuitous circumstances, he is assigned by the director of a big firm to accompany for one night the daughter of the firm's accountant, Titi (María Mercader). Leo pretends then to be the son of a tycoon, and takes her in a luxurious restaurant.
