John Brown (Matthew Broderick) is a security guard at a robot laboratory. His dream is to become a real policeman one day. One day, a plan of the laboratory was stolen, and the highly respected doctor was also killed. John tracked down the murderer, but he encountered a serious car accident and his life was hanging by a thread. Previously, the old doctor was conducting a study called "Gadget Program" with his daughter Brenda (Joely Fisher). Taking this opportunity, Brenda transformed John into a powerful cyborg. John, who was resurrected and renamed Gadget, looks no different from ordinary humans on the surface, but his body is equipped with more than 10,000 sophisticated mechanisms. He realized his dream and became a capable assistant to assist the police in catching criminals. At the same time, the evil scientist Dr. Crow (Rupert Everett) used the research of Brenda and her daughter to create robots for crimes and framed Gadget for the crimes. In order to uphold justice and wash away the charges, Gadget and Crow started a battle between police and criminals...