Director Rosé and his opera company travel to Monte Carlo where they expect an engagément to perform at the opera house. During the boat trip Mario, the cheerful tenor, meets a girl hidden in his cabin. He helps her singing for her passage and soon Nicole is adopted by the whole troupe. Then at Monte Carlo the opera director has no intention to sign them. But he has an eye for beautiful women, so Nicole will try to persuade him to reconsider the offer.
| Actor | Role |
|---|---|
 Jan KiepuraMario Delmonti | Mario Delmonti |
 Danielle DarrieuxNicole Nadin | Nicole Nadin |
 Lucien BarouxRosé, director | Rosé, director |
 Julien CaretteCoq | Coq |
 Charles DechampsArvelle, director of the Opera | Arvelle, director of the Opera |
 Bill BocketNot listed | Not listed |
 Jeanne CheirelFashion salon director | Fashion salon director |
 Colette DarfeuilMargot | Margot |
 Rolla FranceVera Valetti | Vera Valetti |
 André GabrielloFavrolles | Favrolles |
 Edouard HamelNot listed | Not listed |
| HHermantNot listed | Not listed |
| NNono Lecorre'Casserole' | 'Casserole' |
 Pierre PiéradeNot listed | Not listed |
 Paul KempMan in casino (uncredited) | Man in casino (uncredited) |