A series of murders is being carried out by someone claiming to be Jack the Ripper. In response, a vigilante group of the town's poor confronts Scotland Yard while William and the real Jack scramble to uncover the true culprit's aims and foil their plans.
Second son of the Moriarty family,
the young mathematics prodigy.
Zweiter Sohn des Grafen Moriarty
und ein mathematisches Genie.
El segundo hijo de la familia Moriarty,
el joven matemático prodigio.
fils cadet de la famille
et brillant mathématicien…
O segundo herdeiro da família Moriarty,
o prodígio na matemática.
Второй сын графа Мориарти,
юный гений-математик.