(Based on the video game of the same name)
A 'Green Flu' breaks out in Pennsylvania. Francis, a resident of Fairfield, Pennsylvania, survived through the outbreak, after missing the evacuation and being left for dead. Soon he forms a group with three other people trying to survive hell on earth. He joins up with Zoey, who is a college student. Bill, who was a war veteran and Louis, an IT analyst. The four try their best to survive through the hordes, and soon discover the living dead is the least of their worries.