The film takes place at an undetermined point in the future, when humanity has developed advanced robotic technology with enhanced artificial intelligence. This includes the use of cybernetic organisms (or ''cyborgs'') called the TR-4 (all TR-4s are played by Paul Logan (actor)) for general labor. After being reprogrammed by the newest model TR-5, the machines instigate a cybernetic revolt against humanity, bombing cities and sending thousands of armed, identical TR-4 android (robot) to eradicate all human life.