The film stars Alberto Sordi, Michèle Morgan, Marcello Mastroianni, Sylva Koscina, Gabriele Ferzetti, Dorian Gray, Franca Marzi, Franco Fabrizi and Jorge Mistral.

Among these events, that of Aristarco Battistini, a penniless lover and administrator of a famous opera singer, Ada Gallotti, with a far from attractive appearance, unlike the beautiful tourists who animate the life of the Riviera.

For Aristarchus, the holiday proceeds in the most total monotony, always and only called to take care of the singer (whose movements are made difficult by her size) and to indulge her whims and needs.

The lucky occasion that pushes Aristarchus to realize his plan, however, is the meeting, during the holiday, with Jacqueline, a beautiful French tourist and his old flame who on seeing him is fascinated by the belief that he is a rich successful globetrotter.

The unemployed and indebted Walter undertakes to tail the wealthy lady with polite manners and a thousand attentions, to win her trust and convince her to grant him a loan.

But the attention that the rich tycoon turns to his friend Sandro's wife becomes more and more pressing, until poor Renata understands the truth: that she was used by her husband to make Mr. Ferrari condescending and induce him to help him in his economic activity.