Genevieve, a single career woman who works in an advertising agency, reluctantly agrees to take in her elderly Aunt Aline, an ex-cabaret singer who’s waiting for a spot in a retirement home. She finds out that this previously unknown aunt was her deceased mother’s best friend. Super-organized, Genevieve returns home each day to find her apartment in disarray thanks to the old woman. Not only that, her secret fling with her colleague Pierre-Alexandre isn’t that secret anymore. When a combination of circumstances makes Aline the mascot of an advertising campaign on which Genevieve is working, the relationship between the two women takes a new turn.