When a Hallowe'en party turns deadly, it falls to Hercule Poirot to unmask a murderer…

During a night of party games, Joyce Reynolds boasts that she once witnessed a murder. No one believes her, but then she is found drowned, face down in an apple-bobbing tub.

Set against a night of trickery and the occult, Hercule Poirot and Ariadne Oliver must race to uncover the real evil responsible for this ghastly murder.