Metropolis is ruled by the powerful industrialist Joh Fredersen. He looks out from his office in the Tower of Babel at a modern, highly technicized world. Together with the children of the workers, a young woman named Maria reaches the Eternal Gardens where the sons of the city's elite amuse themselves and where she meets Freder, Joh Fredersen's son. When the young man later goes on a search for the girl, he witnesses an explosion in a machine hall, where numerous workers lose their lives. He then realizes that the luxury of the upper class is based on the exploitation of the proletariat. In the Catacombs under the Workers City Freder finally finds Maria, who gives the workers hope with her prophecies for a better future. His father also knows about Maria's influence on the proletariat and fears for his power. In the house of the inventor Rotwang, Joh Fredersen learns about his experiments to create a cyborg based on the likeness of Hel, their mutual love and Freder's mother. Fredersen orders Rotwang to give Maria's face to the robot in order to send it to the underground city to deceive and stir up its inhabitants. After the robot Maria has succeeded, a catastrophe ensues. The riotous workers destroy the Heart Machine and as a result the Workers City, where only the children have remained, is tremendously flooded. The real Maria brings the children to safety along with Freder. When they learn about the disaster, the rebelling masses stop. Their rage is now aimed at the robot Maria, who is captured and burned at the stake. At the same time Rotwang, driven by madness, pursues the genuine Maria across the Cathedral's rooftop, where he ultimately falls to his death. Freder and Maria find each other again. The son devotes himself to his father, mediating between him and the workers. As a consequence, Maria's prophecy of reconciliation between the ruler and those who are mastered (head and hands) triumphs - through the help of the mediating heart.
