The United States is in turmoil. The Yellowstone Caldera is rumbling to life. An incompetent government is telling people not to panic; that there's plenty of time to evacuate the area and to deal with the problem. Dr. Wayne Hamlin knows the truth. The people who live within a few hundred miles of America's grandest national park don't have months or years, as government officials are telling them. They have a matter of days. The ground over the Caldera starts to swell as pressure within the magma pool builds. Earthquakes begin knocking down every structure within the park. New fissures open. Yellowstone has always had such fissures; they called them geysers, and visitors never suspected the catastrophe they hinted was on the way. Now the fissures are opening up as far away as a hundred miles from the park. Animals of all types feel the vibrations. They don't understand them, but they feel an instinctual need to get far away and begin a desperate migration. The super volcano beneath Yellowstone is in her initial stages of eruption. And the world will never be the same again.