Unspeakable horrors have mysteriously befallen the whole town of Snowfield, Colorado, leaving behind only a few mangled body parts and unanswered questions. Enter two vacationing sisters and a sheriff and deputy from a nearby town, who try to piece things together with the help of a scientist-turned-tabloid hack. But will they unravel the mystery of the monstrous subterranean killing force before they become its prey' Adapted by Dean Koontz from his own novel.