The well-known Borgia Pearl, a beneficial treasure with a history of bringing murder as well as misfortune to its owner considering that the days of the Borgias, is brought to London, many thanks in part to Sherlock Holmes. Yet soon the gem is stolen, as a result of a mistake on Holmes' part, as well as soon afterwards, a series of horrible murders start, the murderer leaving his sufferers with their backs broke as well as surrounded by a mass of shattered china.