The untold story of Sherlock Holmes' greatest rival, Moriarty!

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?

After three years apart, Louis, Albert, and the rest of the MI6 team are overjoyed to welcome William back into their lives. To celebrate both the return of their long-lost friends and the start of their new lives, they invite Sherlock and the rest of 221B to a dinner party. There, Sherlock and William finally reveal the story of the three "missing" years they spent in America.