Plot Synopsis

Under Yellowstone National Park lies the Yellowstone Caldera, a giant hot spot for volcanic activity known as a supervolcano. Now after hundreds of thousands of years lying dormant, it begins to erupt, putting millions at risk. Temperatures plummet and the sky fills with dirty, black clouds of volcanic ash and destructive lightning. Lava erupts from the earth, boils over the crater rims, and rushes across the country side at speeds over 100 miles per hour, vaporizing forests, animals and tourists. Yellowstone's top geologist and an adrenaline junkie Park Ranger race against time to stop the erupting caldera. They must plug the lava flow, as well as stop the poisonous volcano clouds from spreading, before the sky turns black and the entire world is frozen in a permanent, apocalyptic volcanic winter.