A decade after a disastrous meteor impact wipes out most of society, a group of survivalists emerge to find themselves on a twisted version of the old Earth, with a nascent society besieged by vicious marauders, ferocious mutants, and the dreadful symptoms of a post-apocalyptic environment.

In the distant future, a federation marshal arrives at a research lab on a remote planet where a genetic experiment has gotten loose and begins feeding on the dwindling scientific group.