Dr. Ethan Parker, a renowned geologist, is plagued by haunting dreams of a catastrophic volcanic eruption at Yellowstone. As he investigates, he discovers alarming increases in seismic activity that suggest an impending disaster. Despite his warnings, the scientific community and government officials dismiss his concerns as overblown. When Yellowstone erupts in a massive explosion, it unleashes a torrent of lava and ash, plunging the West Coast into darkness and chaos. Cities are engulfed, millions are killed, and the survivors face an apocalyptic new reality. Among them are Ethan and journalist Sarah Lawson, who must navigate a devastated world where resources are scarce and society is crumbling.