Grays roam the land, largely in the absence of human interference. These aren't your typical Zed -- theirs is a very different sort of apocalypse. Animals spontaneously transform into twisted, violent beings. The earth decays, collapsing into a network of abysses. The wilderness thickens.
Life carried on as normally as it could, until another refugee on the run is killed during a nearby attack. Her son is saved and taken in by the Williamses -- who do not realize that this kind action will destroy their home and threaten their entire family. They find themselves caught in the midst of a struggle between two eldritch horrors, and the path to survival is anything but clear.