When a city official is shot and killed with an illegal handgun, Michael Knight is recalled from retirement. The current system of freezing convicts is not working. KITT has been dismantled and the parts sold. Devon Miles has managed to recover all of KITT's parts but one, a chip which has been implanted in the head of a female cop, Shawn McCormick, whose brain was destroyed by a bullet. KITT is rebuilt and installed in Michael's classic '57 Chevy. He and Shawn, who has a chip on her shoulder as well as in her heard, are teamed. Meanwhile, the foundation is preparing the new car, the Knight 4000.