Scientists estimate the massive pool of lava beneath Yellowstone National Park is the size of one of the Great Lakes. When the super volcano erupts it will end life in the United States for millions of people. It could very well be the end of the greatest nation the world has ever known. Daily, the national park rumbles making it apparent it will soon erupt. President Merrill stares at the Top Secret document. Does he accept this as the fate of the nation? Is there anything the most powerful country on earth can do to prevent such widespread destruction? He commissions one last study and is handed the Yellowstone Brief. Volcanologist David Wayne is still grieving over the loss of his wife and son when he accepts an assignment in a remote part of Mexico. FBI Special Agent Heather Martin jumps at the chance to leave her boring job in White Collar Crime to go into the field and investigate an organization suspected to be funded by terrorists. Soon Wayne and Martin are caught in the middle of the restless Yellowstone caldera. One must bring down the terrorists; the other must prevent a national disaster. Both must succeed or the nation will be lost forever.