未来的一天,太阳活动引发了隐藏在墨西哥金字塔的一个灯标,原来这是外星人入侵的信号。几个小时内,外星人的战舰击毁了地球所有的军事设施,地球危在旦夕。一位人类科学家发现了击退外星人侵略者的秘密,于是......Mankind must fight to survive as Earth is invaded by hostile UFOs bent on destroying the planet. As the epic battle wages on, astronauts sneak aboard the mothership where they discover a portal to the aliens' home world. They manage to alert Earth before they are brutally murdered. Left with no other choice, Earth sends an elite military team of science and combat specialists through the portal where they attempt to stop the invasion from the inside out. But is the battle already lost for humanity?