On a desolate country highway, two homeward-bound teens (Gina Philips, Justin Long) are nearly run off the road by a maniac in a beat-up truck only to later spot him shoving what appears to be a body down a sewer pipe. But when they stop to investigate, they discover that the grisly reality at the bottom of that pipe is far worse than they could have ever suspected and that they are now the targets of an evil far more unspeakable, and unstoppable, than they could have ever imagined!