The heir to the French empire lies dead in the African dust. Europe is brought to the brink of war by forged dispatches, designed to enrich gun-runners and assassins. The gold-fields and diamond mines of South Africa become the playground of organized crime.
Only the detective genius of Holmes can prove a match for the unfolding criminality of Moran and his associates. With Watson and Mycroft at his side, Sherlock Holmes again demonstrates although the powers of the state and the underworld may try to overpower him, they will never out-think his splendid analytical mind at the height of its powers.