Science fiction action/adventure prequel leading directly into the eagerly anticipated Independence Day sequel, released a month before the film. In the days following the alien invasion, the international community recovers and builds up Earth's defenses using technology salvaged from remains of the enemy forces. However, pockets of aliens still must be located and eliminated, and the bizarre technology proves as dangerous as it's creators. Then it's discovered that the aliens were able to send a distress signal before their final defeat...