Mr. Fortescue, the head of a large corporation, dies under mysterious circumstances. The autopsy reveals he was poisoned. He was not well-liked, and even his own family had motives for wanting him dead. But who is truly behind his murder? And who is responsible for the deaths of his young servant and his wife in the days that follow? Naturally, the only one capable of unraveling this mystery is Ms. Marple. And, as always, the culprit is the last person you’d suspect.