Six students from Stanford on summer break journey into The Wind Cave; one of the longest and deepest caves in North America. But what begins as a four-day excursion turns into a thirty-day life-or-death battle for survival. The second day into their trip, nuclear war is launched against the United States from within the country. The geography of the cave has changed with the movement of the blasts, and the group is unprepared to sacrifice what they must to escape. With their exit blocked and their food supply dwindling, they must navigate the maze of tunnels to find an alternate exit back home – if there’s still a home to return to.