In the future, ex-military pilot Sam Asgarde is one of the few who have survived a worldwide plague as well as giant mutant spiders. The remnants of humanity scavenge through the ruins of civilization in fear of their own inevitable deaths. A militaristic religious cult led by Reverend Zek have gained absolute power and will use any means to eradicate all but the "chosen few". Zerk, learning that Sam owns a milk cow, intends to kill him and butcher the animal. An alien woman, Karuy, who carries the cure for the plague in her blood, helps Sam fight off Zerk's fanatical army with her highly-advanced weapons. Karuy and Sam fall in love, and she is subsequently captured and tortured by Zerk. Sam, a man with a terrible secret, has to make a choice leading to a fiery Armageddon in a desperate bid to save humanity.