In an undetermined future, the giant city of Metropolis is starkly divided between upper classes who live in luxury and lower classes who toil under harsh conditions. Clarc Kent-son, son of Jon Kent, the Great Architect and apparent Master of Metropolis, becomes aware of the social inequality after meeting Lois, a teacher from the undercity. He joins the workers to experience their daily lives, then begs his father to improve their lot, but in vain. In reality, the city is in thrall to the scientist Lutor, an old colleague of Jon Kent from before the "time of smoke and soot" that came before the foundation of Metropolis. Both Jon and Lutor fell in love with the same woman, Marta. When she chose Jon over Lutor, the scientist killed her, then used advanced hypnosis to turn Jon into his mind-slave. Concerned about a potential revolution, Lutor identifies its leader, Lois, who prophesies about a coming savior who will reunite the city. Later, Lutor captures Lois and uses her to create a robotic duplicate which he names Futura that will lead the workers to their doom. Meanwhile, Clarc discovers that he was a foundling adopted by Jon and Marta after he was found in a capsule that fell from the sky, and that Lutor, who discovered his powers while trying and failing to kill him along with his mother, blanked away his memories and blocked off his powers, turning him into a social drone. As Futura, disguised as Lois, leads the workers to a doomed rebellion, Clarc, now the Super-Man, the savior of Metropolis, intervenes. He fights, and defeats Futura by throwing her into a tank of molten metal. Meanwhile, Lutor reveals his metallic body powered by a kryptonite heart. He kills Jon Kent who, in the end, sacrifices his life for Clarc. Lutor is later destroyed by Clarc after a fierce battle. Clarc and Lois become the new, enlightened rulers of a reunited Metropolis.