Romane, a family doctor, lives alone in Paris. When a long-standing patient insists that she saw Romane coming out of a hospital in Marseille, and that she looked very ill, Romane thinks she is being absurd. But her patient is absolutely convinced. Yet Romane is perfectly healthy and has never stepped foot in Marseille. Who did this woman see?
On a whim, Romane sets off for the south of France, determined to uncover the mystery of her lookalike. Her journey leads her to an overwhelming revelation, the discovery of a family secret kept hidden for years and, ultimately, a second chance at life.