Patrick Holt portrays "Dax," a crime novelist experiencing writer’s block. His wife, "Kate" (Diana Dors), proposes they spend some time in the countryside, where they meet "Miss Tulip" (Cicely Courtneidge) – though their encounter is brief. They awaken to find Miss Tulip deceased and a French window left open. The police are called, and “Insp. Thorne” (Joss Ambler) begins an investigation. Diana Dors’s performance fe…