When a sentient ship which collects and preserves dying civilizations mistakenly collects Metropolis, Superman investigates and discovers that the evil Brainiac has become trapped and has infiltrated the ship's systems.
Lex Luthor wants Superman out of the way, so he busts the Parasite out of jail and gets him to drain Superman's powers--and it is up to Lois Lane and Jimmy Olsen to free him.
Lex Luther steals a special chip called the Mega Module that will give his battle suit power levels similar to Superman's, and sets out to claim the title of the real Man of Steel.
Superman answers a call for help from the freedom fighters on the planet Apokolips, and must battle Darkseid and his parademons in order to free the slaves called Lowlies, and get them to safety.