Hercule Poirot is about to go to Styles—the very place where his brilliant career as a detective began. Stricken with arthritis and with reduced mobility, the great Belgian invites his old friend and assistant Hastings to come along, so that Hastings will be Poirot’s ears and eyes—still feeding the brisk “grey cells” of his.
The famous pair faces another complicated case. The criminal is unknown and, for now, goes by the name “X.” But Poirot warns Hastings: he is very dangerous. This is the perfect killer—an intellectual who leaves no traces or clues. Several murders are on his conscience, and he intends to commit another—killing Hercule Poirot himself…