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 successfully establishing a foothold in Durham and cleansing the city of some of its corruption, William James Moriarty sets his sights on London. To make headway there, he needs the aid of his brother Albert. But while on his way to London, William is kidnapped by a gang of criminals! Will Albert be able to save him in time?