Never-before-told details of their past cases are revealed in this spin-off series. William and his brothers return to the Moriarty manor in Durham, now a desolate ruin. Hidden in one of the rooms is a notebook where Louis has kept a meticulous record of his favorite cases, such as—a cunning little "play" William performed when he became intrigued by a cheating scandal Moran got involved in at a bar, and a dangerous "test" three young brothers had to pass to become the pupils of "Jack the Ripper"— The manga adaptation of the novel that chronicles their untold days beings right now!! (Source: MANGA MILLION)