This new arc is a great jumping-on place for new readers to discover the book every X-fan is talking about! Something lives under District X, something that loves the dark…and it’s leaving a trail of murders in its wake. In a world that’s rarely black-and-white, will Bishop and his partner Ismael be able to make the right calls that save people’s lives? Or will they be helpless against this predator under the streets?
— Description from Comic Vine community (comicvine.gamespot.com).