Set in the future, Metropolis is a grand city-state populated by humans and robots, the co-habitants of a strictly segmented society. Amidst the chaos created by anti-robot factions, detective Shunsaku Ban and his sidekick Kenichi are searching for rebel scientist, Dr. Laughton, to arrest him and seize his latest creation, a beautiful young girl named Tima. When they locate them, Shunsaku quickly comes to realize that the eccentric scientist is beyond their reach, protected by a powerful man and his fierce desire to reclaim a tragic figure from his past.