Low-budget sci-fi action set in outer space. Bruce Campbell stars as Alex Windham, an intergalactic terrorist who escapes from jail and heads into space along with a group of fellow escapees. The gang sets its sights on Dome 4, a space research facility that Alex plans to use for his own sinister purposes. When interstellar peacekeeper Chas Moran (Joseph Culp) travels to Dome 4 to visit his wife, who works as a researcher at the facility, he finds himself face to face with the terrorists - but can he bring them down single-handedly?