Sheep-fearing Henry (Nathan Meister) returns to his brother's (Peter Feeney) New Zealand farm, hoping his sibling will buy out his share of the property. However, what he finds are genetically altered sheep that prey on humans and turn their victims into undead, woolly killers. Shear madness ensues as Henry, an animal-rights activist (Danielle Mason) and a farmhand (Tammy Davis) set out to stop the rampaging animals.