Vietnam War hero Kowalski (Barry Newman) has become a pill-addicted driver for hire. Transporting a car from Colorado to California, he enlivens the journey by making a wager with his drug dealer: If the trip takes under 15 hours, Kowalski's latest amphetamine purchase is free. But Kowalski's recklessness on the road results in a much-publicized police chase. Radio jock Super Soul (Cleavon Little) covers the pursuit and turns Kowalski, who refuses to pull over, into a martyr for freedom.