Mario Bianchi comes to the United States and moves in with his uncle, who runs a restaurant in New York City. Mario falls in love with his uncle's adopted daughter, Rosina, and teaches her several Italian dances to entertain the customers. However, Mario gets into trouble with gangster Tony Mora, knocking Tony down for forcing his attentions on Rosina. Tony forces Mario's uncle to fire him and sees to it that Mario cannot keep a job. Mario, mistaken for a famous racing driver, signs with a car manufacturer to drive in an important race. Tony sabotages the car, but Mario wins anyway, receiving a substantial amount of prize money. Mario and Rosina are married.
—AFI