In this exciting and powerful BBC drama based on the bestselling novel by Agatha Christie, ten strangers are drawn from their normal lives to a mysterious mansion on an island off the Devon coast. As the weather turns and they find themselves stranded, a lone voice echoes through the house. The terror mounts as they hear a bone-chilling indictment. These strangers share one thing in common: each stands accused of a terrible crime for which a price must now be paid. All too soon they will start to die; brutally slaughtered one by one, the killer inspired by a nursery rhyme that hangs in every room of the house. The ill-fated guests form a tentative alliance, each afraid of the other but having no one else to turn to, desperately hoping to combat the killer in their midst. But as the body count rises, awful secrets are drawn into the light and the group splinters, mutual suspicion giving way to a sense of certain doom. For if all are destined to die, who can their executioner be?