This is the story of Henry Oldfield, son of a prominent sheep farmer in New Zealand, who, following a tragic incident in his childhood, suffers from a fear of sheep. He returns to the farm to sell his share of the family property to his older brother Angus. But while there is discovers the terrible secret… Angus has been experimenting in order to create a new breed of sheep, The Oldfield, but things go a little wrong and before you know it the mutant killer sheep are terrorising the land.