In 2028, OmniCorp., a robot company specializing in arms development, produced a large number of well-equipped mechanical war police. They were put into peacekeeping and punishing crimes, and achieved remarkable results. In Detroit, where criminals are rampant, Alex Murphy (Joel Kinnaman), a policeman who hates evil and has a strong sense of justice, was plotted by his enemies and suffered devastating damage to his body. With the cutting-edge technology of Omni's genius doctor Danny Norton (Gary Oldman), Murphy was resurrected in the form of a mechanical war police. Several rounds of rigorous tests have shown that Murphy is capable of taking on the heavy responsibility of maintaining social order. His reputation has soared among the people, while Murphy's wife Clara (Abbie Cornish) and son David can no longer feel the warmth of their loved ones from him. Sensing the pain of his wife and children, Murphy is determined to fight back against the criminal leader who planned to kill him...