If Simon Blunt's body was graced with an appendix scar in life, why has it been deprived of one in death? Blunt's Oxford classmates, eighty-one-year-old Dr. William Blow and seventy-nine-year-old Professor Gideon Manciple, ponder the intriguing implications. Blow and Manciple are joined by Blunt's sister, the indefatigable eighty-year-old lass Simonetta, and the merry trio of sleuths bungle through a baffling but amazingly effective investigation to reveal an ingeniously clever solution.