Aliens plan to take over the U.S. by recruiting disaffected loners who are themselves "invisible" to normal society. The alien crab-like creatures attach themselves to human hosts and control them. The recruits are assigned low-level jobs of highly appointed government officials so they can get the alien in close proximity to them. A U.S intelligence agent infiltrates the alien organization, but it may be too late.
Did You Know?
During the last scene where the creature is going after Spain a string could be seen attached to it (aprox 49 mins). See more