"Throughout history, compassionate minds have pondered this dark and disturbing question: What is society to do with those members who are a threat to society, those malcontents and misfits whose behavior undermines and destroys the foundation of civilization?" They creep. They crawl. They kill. They're the Zanti misfits. With the rulers of the planet Zanti threatening total annihilation unless they are allowed to exile their criminals to our world, Earth officials have no choice but to transform a remote section of the desert into an alien penal colony. Providing security, the U.S. military watches helplessly as a psychopathic intruder (Bruce Dern) stumbles across the sealed spacecraft and unleashes a torrent of screeching, scurrying space critters. Like ants run amok at a picnic, the Zanti misfits gleefully overwhelm anything and everything in their path as they demonstrate to the military just what the word "invasion" really means.