Container ships carrying nuclear bombs are detonated in several American port cities, throwing the nation into panic. Paul Edwards and his prepper father-in-law, Buck, with whom he does not get along, must travel together from Nebraska to Georgia to save Paul's wife and daughter from the aftermath of the nuclear explosions.

America continues to teeter on the brink of collapse after terrorists detonate black-market nukes from container ships. With deadly clouds of radiation swooping in from the wasteland of American port cities, Paul Edwards and his father-in-law Buck seek shelter in a spectacular government bunker, the likes of which has never been seen. They've succeeded in finding safety from the threats outside, but in a world without rules, trust can be a dangerous...