High school juniors Billy Gunn and Rory Wilder return from a weekend camping trip to find a mysterious plague has wiped out their small town of Port Moss, Mississippi. The question of why is only the beginning, especially when the dead refuse to stay dead.

For Billy and Rory, figuring out what happened is the first priority, but complications quickly set in. Not only do the dead rise, but a freak storm threatens torrential downpours as winter looms. And enormous ships appear in the sky, bringing with them alien visitors with technology never seen before.

Left without electricity and modern conveniences, Billy and Rory must figure out a way to navigate horrific zombies, advanced alien life forms, and apocalyptic storms, as well as deal with their growing love for each other in a world gone mad.