In Oscar Wilde's Amethyst Tie-Pin, the 24-year-old Sherlock Holmes recounts how he untangled the web of blackmail and deceit surrounding the 'complex romantic endeavours' of the Prince of Wales, later King Edward VII, those of Lillie Langtry and her various suitors and the morass of 'scandal sheets' and libel cases surrounding the Prince's court of the time, while at the same time solving the mystery of Oscar Wilde's missing amethyst tie-pin.