In a small farming community, the Office of Scientific Investigation and Research (OSIR) investigates the strange mutilation and seemingly ritualistic slaughter of livestock animals. When the team arrives, the locals seem much too eager to explain away the incidents as mountain lion attacks. Is it alien activity they're trying to hide, or is there a perpetrator much more apart of their community? The sheriff Bruce Pirrie), the county vet (Les Carlson) and local farmer Katlin Jessup (Brenda Bazinet) and her teenage son Tyler (Matthew Lemche) seem eager to dispose of the remains and get on with the day's work. What do they really know about what's lurking in the woods?
Case Manager Matt Praeger (Matt Frewer) and the team quickly discover some strange factors in the case: all the slaughtered animals are female, and their reproductive organs have been selectively removed. They also all bear the same blue ear tags, indicating they come from a common source. But when Senior Analyst Lindsay Donner (Nancy Anne Sakovich) tries to use Tyler's apparent infatuation with her to get to the truth, a local posse of hunters threaten the boy into silence.
Donner uncovers the fact that many of the townspeople are employed by the same agricultural research company, GemAgro, just as the mysterious Michael Kelly (Michael Moriarty) materializes with insinuations that GemAgro is an organ farming operation. As Praeger prepares to act on this information, the attacks turn more menacing and deadly, adding the first human to its toll. Even more confusing are the strange clues the killer or killers start leaving behind, including a child's battered picture book found in an OSIR vehicle. When zoological expert L.Q. Cooper (Peter Blais) makes the breakthrough that the killer's blood is both animal and human, the OSIR realizes they've stumbled into a major conspiracy of bio-technology: has GemAgro been manufacturing half-human, half-animal organ donors?
The team races to find the creature's hiding place, which they discover deep in an abandoned mine. When Donner and Chief Science Analyst Peter Axon (Barclay Hope) convince Tyler to lead them into the shafts, a cave-in cuts Donner off from the group -- right in the creature's lair. But is the creature really a monster, or is it human enough to know it must stop the terrible experiments which created it?