On a stormy night, young Jim, who transports a luxury car from Chicago to California to deliver it to its owner, feeling tired and sleepy, picks up a mysterious hitchhiker, who has appeared out of nowhere, thinking that a good conversation will help him not to fall asleep. He will have enough time to deeply regret such an unmeditated decision.
The original characters from the first Cannonball Run movie compete in an illegal race across the country once more in various cars and trucks.
Los Angeles SWAT cop Jack Traven is up against bomb expert Howard Payne, who's after major ransom money. First it's a rigged elevator in a very tall building. Then it's a rigged bus--if it slows, it will blow, bad enough any day, but a nightmare in LA traffic. And that's still not the end.
After a young boy is almost runover by a maniac on a highway, a re-encounter and confrontation by the boy's father with the driver sets off conflicts with a carful of maniacs.
Rebelling against his dreary life in a small Arizona town, salesman Nick abandons his girlfriend, Beth, and strikes out onto the highway in search of... something else. Encouraged by her best friend, Carol, Beth reluctantly accepts the romantic attentions of Sid, a local housepainter.