Childhood best friends Claire (Anaïs Demoustier) and Laura are utterly inseparable, so it comes as a particularly devastating blow when Laura becomes ill and dies, leaving her husband, David (Romain Duris), to raise their newborn daughter Lucie by himself. As she stops by the house one afternoon, door unlocked, she finds a strange woman holding Lucie, who, on closer inspection, turns out to be David in a blonde wig and one of Laura's dresses.
