It seems an evil fog rolled into town one day, taking most of the townsfolk with it, leaving only a handful of unlucky survivors and ... zombies. They aren't your typical, garden variety zombies, though. No, these zombies never die, as the narrator explains, "Kill one, he'll rise in the morning. There's no getting rid of them." There's no telling if the actual game will hold up at this point, but the premise thus far is certainly intriguing.