A psychological drama in the style of a true English detective novel, based on the play by John Boynton Priestley. "Truth is a sleeping dog!" England, 1920s. A "nice little group"relatives and close family friendshas gathered at the home of successful publisher Robert Caplan. The seemingly friendly conversation takes a sharp turn when the conversation turns to Robert's brother, Martin, who committed suicide under mysterious circumstances a year earlier. Seizing on a small untruth, the host begins to unravel a web of lies that reveals the true traits and characters of the family members and uncovers a terrible truth...