Caldera 4

Months after an ancient rage virus erupts from the depths of Yellowstone, survivors find themselves battling not only the infected, but each other. Predators prey on the weak and strength comes only in numbers. Government researchers are working tirelessly to find a cure, but time is running out. Over 90% of the world's population is dead or infected and the number climbs daily. Follow a select group of survivors as they fight to carve out an existence while defending themselves from rage fueled cannibals and roving bands of marauders.