In the year 2052, Earth enjoys a fragile peace shattered by the ruthless Death Force, extraterrestrial beings driven by the need for a new home. With the menacing Terror Star satellite ship, they embark on terraforming the planet for their colonization. Humanity's last chance rests on Colin Collins and a brave group of surviving students who must operate a clandestine submersible craft capable of battling the alien threat on both land and in the depths of space.