Arthur - a late-night radio DJ in rural Crestone, Colorado - receives an urgent call from his co-worker, who hit something with his car on his way into the station. As his co-worker attempts to search for what he hit, it becomes apparent that whatever it was wasn't your typical woodland critter, but something else entirely - something inhuman and dangerous. As it begins to hunt, Arthur and his producer can do nothing but sit back and listen to the horrifying events unfold.