Buck breaks into a prison to free Jen Burton (Jamie Lee Curtis), where she has been falsely jailed for the murder of her boyfriend. Earth Defense Directorate hopes to return her home so she can testify against the boyfriend, Malary Pantera (Michael Delano), a pirate who has been raiding space lanes. Entering the prison while masquerading as a fellow prisoner, Buck finds Burton, frees her, and they head out across the barren desert terrain of the planet. However, traveling to the nearest spaceport is the least of Buck's problems, as Hugo (Walter Hunter), an indestructible android prison guard, is following their every move and will stop at nothing to capture the two Earthlings.