Movie Story : Earth is under attack by hostile UFOs intent on annihilating the planet, and humanity is locked in a desperate fight for survival. During the battle, a group of astronauts slips aboard the alien mothership and uncovers a portal leading to the enemy's home world. They succeed in warning Earth before they are brutally killed. With few options left, an elite team of scientists and soldiers is sent through the portal to try to halt the invasion from within.