After a childhood prank by his brother Angus causes Henry to develop a phobia of sheep, he must step up to the onslaught of a genetically-mutated man-eating flock with the help of his friend and a young environmentalist.

After a childhood prank by his brother Angus causes Henry to develop a phobia of sheep, he must step up to the onslaught of a genetically-mutated man-eating flock with the help of his friend and a young environmentalist.