Evelyne, a woman of bourgeois origin, now reduced to dancing in a sleazy nightclub, is reunited with her first love, who has become a successful doctor.
Casti and Trébois, two friends who are workers at the same factory, have developed a common passion for flying. They dream of starting an aviation club. In the meantime they spend all their Sundays restoring an old plane under the supervision of Raf, a former RAF pilot...
Jean-Paul is a Frenchman who yearns to live in communist Czechoslovakia. His wish is granted when, mistaken as a masseur of a French boating team, he manages to elude the democratic authorities long enough to scamper over the Czech border.
