The Thompson-Thorpe automobile was once a great car but the failure of the owners to be able to agree on needed changes led to the break-up of the company, and Thompson and Thorpe has each started their own car-manufacturing company. Not knowing his true identity, Earle Thorpe Jr. has been hired by Henry Thompson to drive his new car in an upcoming race. Thompson has two crooked mechanic/engineers who plan to make their own car, using Thompson's plans, and win the big race themselves. Thompson's daughter, Ette, and Earle become close and resolve to settle the feud and re-unite Thompson and Thorpe Sr. They take the best features of both cars and combine them into one super car. But, Stanley Steele, the Thompson mechanic steals the car.