Rival bus companies find an unusual go-between in a former auto racer.

Racing car driver Bill Foster is disqualified for reckless driving after winning a race. When he protests, he is banned from the racing association. Later, while driving to Westport with his mechanic, Stub Wilson, Bill collides with a bus belonging to Neeley Transport. Determined to recover the cost of his wrecked car, Bill insists on seeing the owner of the company. To his surprise, Jerry Neeley is an attractive woman who angrily denies responsibility for the crash. When Bill learns that he has been suspended from racing, he decides to offer his services to Jerry's rival, Tommy Burnell. While driving a Burnell bus, Bill stops to help a woman with a flat tire and discovers that she is Jerry. Angry because Burnell's lawyer, Perkins, is suing her for the cost of Bill's car, Jerry begs him to drop the suit in exchange for fixing his car. In the meantime, Perkins acquires power of attorney from Bill and uses it to continue the suit against Bill's wishes. Thinking the suit was dropped, Jerry does not appear in court and loses by default. With her company facing liquidation, Jerry accepts a call to take a busload of children to the park. Bill learns that Jerry's bus has defective brakes, having been doctored by Mark Banning, a Neeley employee who is secretly working for Burnell, and races to stop her before the bus reaches a long downhill grade, but is too late. After pursuing the runaway bus, Bill leaps on the vehicle and drives it uphill until it stops, saving everyone. Because of his successful lawsuit, Bill has himself appointed receiver of the Neeley company and files charges against Perkins. Jerry, however, believes that Bill always intended to take the company away from her. He insists that he will get the company in financial shape despite her and drives in an outlaw race to get the money. He hires his racing friends to repair the buses, and things start to look up. Then Jerry is warned that her franchise application will probably be denied. When one of her new drivers hits Councilman Baker's car, Baker vows to drive the Neeley buses out of town. Bill hurries to City Hall to offer his newly repaired racing car to Baker in exchange for his damaged car. They arrive after the vote to learn that everyone except Baker voted to retain the franchise and Jerry will stay in business.