Fred Cavaye directs this French action thriller following a man as he races through the streets of Paris to save his pregnant wife after she is kidnapped. Life is going well for young couple Samuel (Gilles Lellouche) and Nadia (Elena Anaya). He is about to qualify as a nurse, and she is about to give birth to their first child. But their world is turned upside down in an instant when Samuel inadvertently becomes embroiled in the schemes of a criminal gang that will stop at nothing to achieve its goal.

Betty Fisher (Sandrine Kiberlain) is a successful novelist whose life is struck by tragedy when her only son falls from his bedroom window and later dies in hospital. Sometime later Margot (Nicole Garcia), Betty's mother, sees a young boy playing in the street nearby and brings him home to serve as a replacement son for Betty. The boy's mother, Carole (Mathilde Seigner), then reports the disappearance to the police, helping to set off a chain of events which bind the protagonists together in ways they never expected. Adapted from a novel by Ruth Rendell.