A tribe of Neanderthals under the influence of a glowing red comet develop super intelligence and eventually teleport themselves to another dimension. Anthropologist Paul Dover discovers their ancient dwelling place and is present when Ogar teleports back to Earth. Paul must defeat Ogar and stop the invasion.
Aliens begin to plow the planet Earth to grow their strange crops, but scientist Eric Taine has an idea on how to stop them from destroying the planet.