In the late 19th century, amid Great Britain's imperial glory, a rigid class system determines one's worth by riches and status. William James Moriarty, second son of the esteemed Moriarty family, leads a dual life as a nobleman and a secret ally of the common people, aiding them in their struggles. Yet, harboring a burning ambition to dismantle the oppressive societal hierarchy, William, joined by his brothers Albert and Louis, embarks on a perilous mission to reshape their world, ready to sacrifice even lives to achieve their goal.