In this melodrama, a brash young racecar driver zooms his way to the winner's circle in his last chance to beat his longtime rival. Bill Whipple has an argument with his foster father, Jim MacDonald, also a racer, before the Indianapolis 500 race, and deserts him to drive another car. At the same time as MacDonald is barred from the race because of a weak heart, Whipple is ditched by the owner of the other car. He returns to race with MacDonald, and toward the end Whipple lets him take the wheel for the winning finish.