The war against the darkness escalates! As the División del Norte battles on, Pancho Villa and his unlikely allies — the fierce soldadera Petra Herrera, cynical German expat El Alemán, and mystical alchemist Sabia — face an ever-growing horde of eldritch horrors in the streets of Monclova. But when a new mechanical nightmare, the unstoppable El Charro Muerto, is unleashed by Villa's enemies, the team is forced to make an impossible choice: stay and fight for the Revolution... or pursue the greater cosmic evil threatening all of México.