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?

While a new street drug quietly eats away at the streets of London, the eerie death of a young noblewoman of a now-penniless family catches the eye of the Great Detective Sherlock Holmes. The twists and turns of his investigation soon uncover a crumbling estate filled with exotic beasts, an eccentric father with an unhealthy obsession toward his daughter, and a secretive tribe of nomadic Romani. But how are all of these clues connected? And what do they have to do with the mysterious "speckled band"?