Lateonenight,amysteriouscarisbroughtintotheChicagopoliceimpoundgarageafteradeadlytrafficaccident.Theon-callmechanicssoondiscoverthecarhasamindofitsown.Withhundredsofhorsepowerandtwotonsofreinforcedsteelatitscommand,itsaseeminglyunstoppablekillingmachinecapableofoutrunning--andoutwitting--humans.