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.
In Naples in the second half of the nineteenth century, a young noblewoman falls in love with a nobleman of ill repute.
This film relates the story of Russian Princess Fedora (Louise Ferida), in Czarist times, whose royal lover is assassinated on the eve of their marriage. She pledges vengeance, only to become the victim of her vow when she falls in love again.
