DEFCON-4

While on a fishing trip, Harry Baldwin and his family hear an explosion and realize that Los Angeles has been leveled by a nuclear attack. Looters and killers are everywhere. Escaping to the hills with his family, he sets about the business of surviving in a world where, he knows, the old ideals of humanity will be the first casualties.

The living dead have taken over the world, and the remaining humans live in a walled city to protect themselves as they cope with the situation.

A dirty bomb goes off in Los Angeles, jamming freeways and spreading a toxic cloud.

16-year-old Cassie Sullivan tries to survive in a world devastated by the waves of an alien invasion that has already decimated the population and knocked mankind back to the Stone Age.