Picking up where "Superman: The Movie" left off, three criminals, General Zod (Terence Stamp), Ursa, (Sarah Douglas), and Non (Jack O'Halloran) from the planet Krypton are released from the Phantom Zone by a nuclear explosion in space. They descend upon Earth where they could finally rule. Superman, meanwhile, is in love with Lois Lane (Margot Kidder), who finds out who he really is. Lex Luthor (Gene Hackman) escapes from prison and is determined to destroy Superman by joining forces with the...

After a power source for the community of Krypton survivors is accidentally whisked to earth, Kara-El, cousin to Superman and niece to Jor-El, chooses to go to earth to find it, and bring it back. Upon her arrival, she becomes just a powerful and Super as her cousin, but encounters dangerous battles and unexpected obstacles when a mean spirited woman who practices rituals of the occult takes the power source for herself, and uses it to cause destruction and attempt zenith human status.