Mrs. Elspeth McGillicuddy has come from a shopping
expedition to visit her old friend Jane Marple for
Christmas. On the way, her train passes another train running parallel to her. Then, a blind in one of the compartments flies up and she sees a man with his back to her strangling a woman. She reports it to a ticket collector who does not believe her. When arriving at Miss Marple's cottage, she tells all to her. Mrs McGillicuddy describes the woman as wearing a fur coat and with blonde hair. Only Miss Marple believes her story as there is no evidence of wrongdoing.