An unmanned spaceship returns to Earth carrying samples from Proxima B in the Alpha Centauri system. As scientists study the specimens they discover the alien elements are alive! Soon, the scientists must fight back as the small creatures replicate at an exponential rate, increase in size, turn violent and attempt to take over Earth.

An astronaut doctor Ivan Hood and his fellow astronaut Kelly return from their mission in space to find the world has been taken over by aliens. Now Dr. Ivan Hood and Kelly must lead a revolution to free the human slaves from their alien masters.