Nathan and Claire are over the moon as they're about to tell her family that she's pregnant. But the family reunion doesn't go according to plan. Not only is the family's pharmaceutical business in trouble, her father is also mysteriously attacked by terrorized deer. Nathan reluctantly joins the heavily armed men of the family to find out what causes the odd behaviour. But as they venture deep into the woods, they soon discover that what started out as a hunting party, has turned into Prey.