"Judith Potts is seventy-seven years old and blissfully happy. She lives on her own in a faded mansion just outside Marlow, there's no man in her life to tell her what to do or how much whisky to drink, and to keep herself busy she sets crosswords for The Times newspaper. One evening, while out swimming in the Thames, Judith witnesses a brutal murder. The local police don't believe her story, so she decides to investigate for herself, and is soon...

"When a Halloween party turns deadly, it falls to Hercule Poirot to unmask a murderer....Joyce--a surly thirteen-year-old--boasts that she once witnessed a murder. When no one believes her, she storms off home. But within hours her body is found, still in the house, drowned in an apple-bobbing tub. Famed detective Hercule Poirot is called in to investigate. Set against a night of tricker and the occult, it's up to Poirot to uncover the real evil presence...