The Baldwins are an average all-American family, leaving their Los Angeles home for an annual summer camping trip. They become anything but ordinary however, after they witness their home state disappearing completely beneath an enormous mushroom cloud. The fallout isn't the biggest impact of the nuclear explosion. It's the hordes of frightened and increasingly dangerous survivors that will prove to be the Baldwin's biggest threat. This unpredictable and catastrophic chain of events will eventually lead the family to extreme acts of violence in their desperate plight to survive in a society torn apart.