David Langham, the youngest son of a hot-rod hating father, Judge Langham, buys an old jalopy but, out of respect for his father, doesn't convert it. He changes his mind when Jack Blodgett, the local speed demon, impresses David's girl, Janie Pitts, and David makes his car the fastest in town. Jack steals David's hot rod, and flees the scene of an accident he causes. The car is traced back to David, but the truth comes out in court, although David's father is still unhappy about the car... until David and his friend, Swifty Johnson, use it to apprehend some escaping robbers. The Judge decides to back a movement for building a hot-rod race track for the town.