Under Yellowstone, America's first national park, lies the Yellowstone Caldera, a giant hot spot for volcanic activity-a super volcano. Now after hundreds of thousands of years, there is an eruption. As it threatens to explode again, scientists work to stop the flow of lava before the sky turns black and the entire world is frozen in a permanent, apocalyptic volcano winter.

Title from container. Originally released as a motion picture in 2011.