Before he was Sherlock's rival, Moriarty fought against the unfair class caste system in London by making sure corrupt nobility got their comeuppance. But even the most well-intentioned plans can spin out of control--will Moriarty's dream of a more just and equal world turn him into a hero...or a monster?

Charles Augustus Milverton, the coldhearted King of Blackmail, knows Mary's dark secret, and he's using it to destroy any hope she has of marrying Watson! Wanting to save his best friend from the clutches of the deranged Milverton, who ruins innocent lives for fun, Sherlock decides to face the man head-on! Will London's greatest devil finally face judgment?