The singing stoker and the vamp.

Two-reel Vitaphone short from 1930

A visitor to a big city gets involved in intrigue when a look-alike jewel thief sets out to doublecross his gang.

Larry Evans, champion race car driver, is envied by his chief rival, Eddie DeSylva, who has more ambitions than merely winning the races; he has designs on the motor patent held by Corbett (Tom Moore), Larry's employer. Eddie also has a yen for Corbett's daughter, Norma, who prefers Larry. Eddie intentionally causes a race wreck that injures Larry and sends him to the hospital.

A cop is fired from the force and attempts to solve a string of truck holdups.

An inventor develops a new type of aircraft. A crooked businessman attempts to buy it but the inventor refuses to sell it to him, whereupon the rejected businessman and his henchmen steals the plane and its blueprints. The plane's test pilot, who is the boyfriend of the inventor's daughter, and his sidekick set out to get the plane, and the plans, back.

Knights of the Road stage a convention.