After one of the most lurid murders of the century, Monkswell Manor offers a safe haven for Londoners to rest in luxury. When a snowstorm traps the guests and staff together in the manor, it soon becomes clear that one of them is the killer. A detective arriving on skis interrogates the increasingly suspicious suspects: the proprietors of the hotel; a hyperactive man running from his past; an older woman who dislikes all she sees; a mysterious retired Army major; an aloof young woman with a horrific childhood; and a man of unknown origin who shows up to the manor after claiming his car turned over in the snow. This ever-lasting murder mystery features one of the most impactful surprise endings of all time from Dame Agatha Christie, the foremost mystery writer of her time.