A secret government funded project in attempt to develop a new serum to enhance the cattle breeding process turns horribly wrong spreading a virus -turning the harmless herbivores to flesh eating predators. A group of students come head on with the virus and witness towns getting wiped out while attempting to flee back to the city warning every one of the horrific events that are taking place.
While the scientists struggle to find a cure to bring down the epidemic that they have created. The students struggle to ready their friends and families of the ridiculous but real bloodshed soon to come.