TEOTWAWKI. "The end of the world as we know it." It's been two years since the EMP attack followed by the bombs, creating a nuclear winter of global magnitude. The EMP attack laid waste the electric power grids and electronics of much of the world. Ninety percent of the world's population perished from the wars and the prolonged effects of the EMP attack followed by the bombs that created a nuclear winter. The migrating survivors are mostly from the underdeveloped countries of Central and South America not targeted by the nuclear exchange. They come seeking The Mountain known to contain food and technology that survived the wars. Sheltered inside the unused Yucca Mountain nuclear waste repository in Nevada, a group of survivors briefly venture out of their underground refuge only to face a battle with these hostile foreign survivors seeking to take the "The Mountain." An attack from within causes much death and ignites military action that spreads to a hoard of survivors migrating to the region and seeking to take control of the Mountain. Both the activists and the survivors in the Mountain realize the jet stream is returning the fallout of the nuclear winter to the region. Both seek to replenish food and supplies needed to carry them through another siege by the nuclear fallout. The survivors repel many assaults and attacks until they are forced to resume shelter inside the Mountain when a belt of radiation returns. Inside the Mountain, they prepare to battle for their survival once the radiation outside subsidies and the attacks resume.