A crack-pot scientist aligns with the Axis of Evil to bring down the United States with EMP blasts, toxic zombification gas and by unleashing the ultimate undead killing monstrosity: the Z-REX. When a hot-wired militia squad and a crew of college hipsters are thrown together to do something about it, chaotic Predator-Thunder action runs amok.

After atmospheric catastrophes send Los Angeles into chaos, three groups of survivors who escaped the city must put aside their differences to face a series of apocalyptic events. As they learn to work together they are faced with an even greater nightmare, giant gravity swells that contain thousands of giant killer bees, intent on ushering in the end of the world.