In an attempt to conquer the Man of Steel, affluent executive Ross Webster recruits the inept yet clever Gus Gorman to create synthetic kryptonite. However, this new kryptonite brings about unforeseen psychological consequences in the third film of the 1980s Superman series. As Superman navigates a rekindled romance with his high school sweetheart, he also faces the challenges posed by a formidable supercomputer, all while trying to save himself and the world.