Wallace Storm, a racing mechanic, and Bob Griffith, a racecar driver, are both in love with Patricia Sanford, the daughter of racing car designer Martin Sanford. Pat is more attracted to Wally, a fact that Bob resents deeply. When Bob accuses Wally of drinking, Wally punches him, and is fired by Sanford. After Bob hires Curley Taylor to replace Wally, Johnny, a young mechanic and admirer of Wally, overhears Curley and Bob plotting something, but he is too far away to hear what they are saying. Some time later, when Wally and Bob are driving in the same race, Wally is winning until Bob locks wheels with him. In the resulting crash Bob is killed, after which Curley accuses Wally of murder. When Wally is found guilty and sentenced to prison, Johnny tells Pat about the conversation he witnessed between Curley and Bob. They examine Bob's car and find a spike designed to puncture the tire of rival racing cars. Pat then takes the new evidence to the judge who agrees to pardon Wally. Pat intends to deliver the pardon in person, but before she can see the warden, Wally escapes with the help of his good friend Bud Keene. They then head for South America where Wally begins a successful career racing under a pseudonym. Pat recognizes the name from a song Wally used to sing and invites him to drive a car she designed. Believing he is still a fugitive from justice, Wally arrives at the very last minute, landing his plane right on the infield. As Wally and Pat drive the car to victory, the police arrest Curley for his part in Bob's death. After Wally is formally pardoned, he asks Pat to marry him.