The headstrong Julietta gets engaged during her vacation on the beach of Arcachon to the older Prince of Alpen. However, the first kiss leaves her feeling uncertain. On the way back to Paris, she seizes an opportunity for an escapade and takes refuge at the home of André Landrecourt, a young lawyer. Julietta makes herself at home in his country house, unaware that the owner is returning with his lover, Rosie Facibey. To keep Rosie from noticing her, Landrecourt quickly hides Julietta in the attic, but she secretly roams the house—leading Rosie to gradually believe in ghosts. After a while, Julietta also starts to haunt André's dreams, and when the Prince of Alpen comes to visit, everyone involved must untangle their feelings. An extraordinary love story, a vibrant social comedy that establishes Louise de Vilmorin as a worthy heir to Marivaux and Jane Austen.