Camille, a lovely young woman, is the rich heiress of Cosmos, a cosmetics firm. The day she is back from a business trip she discovers to her dismay that Vincent, the man she has shared her life with, has taken advantage of her absence to leave her and to move his things out without even leaving a farewell note. Determined to win him back, Camille finds an unexpected ally in the person of Zac, a fledgling writer she meets in the Bois de Boulogne. Like her, the young man has just been dumped by his girlfriend, Léna...