Philippe Claudel directs this psychological thriller with an underlying love story. Lucie (Kristin Scott Thomas) believes that her neurosurgeon husband of thirty years, Paul (Daniel Auteuil), is having an affair. When Paul starts receiving gifts and flowers Lucie begins to suspect Lou (Leila Bekhti), a young Moroccan waitress from their local cafe, is the other woman. As the conflict between husband and wife drives Paul further away from Lucie and closer to Lou, he gradually spends more and more time with a woman he knows little about. Is Lou really all she says she is?