A stranger enters into and forever alters the life of a couple. He claims to be pursued by certain authorities who intend to prevent him from disclosing a secret that only he holds, whence the title. Is he lying, or … Jean-Louis Trintignant, Marlène Jobert, Philippe Noiret, Solange Pradel, Antoine Saint-John, Michel Delahaye, Maurice Vallier Added on Netflix 2023-06-02.