It's Christmastime in London, but a dark cloud hangs over the holidays. The priceless Blue Carbuncle, a magnificent gem, has vanished from the Countess of Morcar's hotel room. A hapless plumber, John Horner, is wrongly accused of the theft. Enter Sherlock Holmes, the brilliant detective with an eye for the extraordinary in the ordinary. A battered hat, a stolen goose, and a hidden gem - these are the curious clues that lead Holmes on a merry chase through the bustling streets of London. Can he expose the real culprit and reunite the Blue Carbuncle with its rightful owner? Put on your headphones and join the adventure!