Originally, author Harlan Coben had optioned off his novel to Hollywood, with director Michael Apted attached. During this time, director Guillaume Canet, who had loved the novel, had been calling up Coben with his take on the novel. Coben was immediately impressed with Canet's passion for the story, and his vision, stating that Canet understood that the novel was a love story first, and a thriller second, which Hollywood never got. When the option with Hollywood fell through, Coben contacted Canet and decided to give him a chance.
Both Guillaume Canet and Jean Rochefort share a lot with the characters they play. Gilbet Neuville (Rochefort) is a horse breeder and his son Philippe (Canet) is a show jumper. In real life, Canet was born to a family of horse breeders and was a show jumper with the French National Equestrian Team. As for Rochefort he has been a horse breeder since the sixties, he owns Le Haras de Villequoy and served as the equestrian events consultant for France Televisions at the 2004 Olympics.