Miss Jane Marple has received a most unexpected letter from the solicitors of her late friend Jason Rafiel: a generous inheritance, if she's willing to utilize her "natural flair for crime." It appears Mr. Rafiel wants Miss Marple to solve a crime. A particularly baffing one since there are no clues as to what happened, when it supposedly occurred, where it was committed, or for that matter, to whom. In fact, the puzzled sleuth has that matter, to whom. In fact, the puzzled sleuth has but one code word to work with: Nemesis.