Days after the encounter at the Swiss waterfall that claimed the lives of Sherlock Holmes and criminal mastermind Professor Moriarty, Pinkerton detective agent Frederick Chase and Scotland Yard Inspector Athelney Jones, a devoted student of Holmes's methods of investigation and deduction, must track down a sinister figure who's determined to stake his claim as Moriarty's successor.
What was Sherlock Holmes doing between his reported death in 1891 at Reichenbach Falls and his reappearance in 1894? In this adventure, Holmes and Watson travel from the Sahara to the ancient city of Timbuktu and beyond to discover the secrets of an ancient parchment that contains a great and terrifying secret.