Two NASCAR hopefuls, driver Larry Rayder and his mechanic Deke Sommers, successfully execute a supermarket heist to finance their jump into big-time auto racing. They extort $150,000 in cash from a supermarket manager by holding his wife and daughter hostage.
In making their escape, they are confronted by Larry’s one-night stand, Mary Coombs. She coerces them to take her along for the ride in their souped-up 1966 Chevrolet Impala. The unorthodox sheriff, Captain Everett Franklin, obsessively pursues the trio in a dragnet, only to find his outmoded patrol cars unable to catch Larry, Mary, and Deke after they ditch the Impala for a 1969 Dodge Charger R/T 440 at a flea market.
As part of the escape plan, Larry’s vehicle enters an expansive walnut grove, where the trees provide significant cover from aerial tracking, and the many intersecting roads (“with sixty distinct and separate exits”) making road blocks ineffective. The trio evades several Dodge Polara patrol cars, a specially-prepared high-performance police interceptor, and even Captain Franklin himself in a Bell JetRanger helicopter. Believing they’ve finally beaten the police, Larry and company meet their doom when they randomly collide with a freight train pulled by an Alco S1 locomotive.