After decades in retirement, a wave of kidnappings from London's immigrant quarters brings Sherlock Holmes back to Baker Street. With a Tibetan symbol as the only clue, Holmes is joined by Jethro Dumont, an American recently returned from a decade in Tibet.
Together, these detectives work to capture the man known only as the Heir, a faceless villain that has built his own personal kingdom in the forgotten shadows of London's underground.
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