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 insane - or is he telling the truth? Who, if anyone, is after him? And what *is* - the secret?

Cast:Jean-Louis Trintignant, Marlène Jobert, Philippe Noiret, Solange Pradel, Antoine Saint-John, Michel Delahaye,

Genre:Drama, Thriller, Mystery,

country:France, Italy,

Production:Président Films, Valoria Films,