Three technicians working in an underground laboratory discover that a nuclear war has destroyed most of the aboveground world. After a brief search for food, the trio find that gangs of murderous mutants want them for their next meal. Will the scientists be able to find other uncontaminated humans to rebuild civilization with, or will they all end up as mutant chow?

After a nuclear holocaust, as the rest of society regresses to primitivism, a small, "elite" group that has managed to escape radioactive contamination takes it upon itself to exterminate those it sees as "unfit", including certain members of its own group.

Two college students decide to take a vacation to the Amazon. While in a small village getting supplies, they provoke the anger of a local scoundrel, whose ruffians beat them up. After renting a boat and sailing down the river in search of some good scenery, the two kids become lost and are forced to jump in the water to avoid a cascade. Now totally lost, they enter a small village, where the natives eye them mysteriously. It is here that they meet a bizarre jungle female, who happens to be the last survivor of a helicopter crash that occurred years ago. She soon develops a bond with the two adventurers...