At 40, Sara seems to lead a balanced life. But she realizes that men no longer look at her. Under pressure, Sara clears herself by spending a night with a young lover.

Sara is a professor of literature at the university. She is forty years old, she leads a balanced life between her profession that she loves, her seventeen-year-old daughter, her companion and a bunch of very funny intellectual friends. But one day, Sara notices that the men no longer look at her in the street. Worse still, his banker, an ambitious young man, even offered him a retirement plan. Sara then begins to wonder about her life because everything that seemed safe and certain begins to crack.