"The Justice League has long protected Earth from all manner of foreign and alien invaders over the years, always keeping a vigilant eye to the skies for the next threat. But what if the threat was already walking the Earth...hiding in plain sight...watching...waiting for their moment to strike... A mysterious new vampire lord has already put a plan in motion to conquer the Earth, and his horde are hunting on the streets of Gotham."-- Provided by publisher.