Mankind must fight to survive as the Earth is invaded by hostile UFOs bent destroying the planet. When the epic battle wages on, the astronauts aboard the mothership where they sneak discovered a portal to the world tinh'the aliens. They managed to warn the Earth before being brutally murdered. Left with no other choice, Earth sends an elite army of scientific experts and fight portal through which they try to prevent the invasion from the inside out. But the battle has been lost to mankind?