This is Metropolis, an advanced future world where robots and humans live together in harmony--or do they? At the opening ceremonies of the newly completed skyscraper Ziggurat, admist the flowery speech being made by the city's primary mover and shaker, Duke Red, a party crasher is shot by a young security guard. When it is discovered the uninvited guest was just a robot, the incident is dismissed but it does catch the attention of two bystanders, Private Detective Shunsaku Ban and his young brilliant nephew, Kenichi. They are in Metropolis on the trail of a case which leads them to Tima, who is in fact a robotic double of Duke Red's deceased daughter. Tima has no idea that she is a robot, nor is she aware that Duke Red has secretly imbued her with enough power to control the world...