Janine Trotter is a young woman who is a fan of Speed, much to the consternation of the possessive Trixie. Janine is punished by her wealthy father, who hates cars because his son was killed by one. Mr. Trotter sabotages the opening of a new speedway and also causes mammoth traffic jams in the nearby city. When he pays three third-rate hoods to sabotage Pops Racer's shop, they are overpowered by Speed and Sparky; they then learn that Janine and Trixie are testing a new car - whose brakes were sabotaged by one of the man's paid hoodlums.