After the wealthy Flying U Ranch owner Sam Talbot is killed by a fall from a horse, reporter Connie Edwards (Dale Evans) enlists the help of newspaper editor Roy Rogers to investigate a rumor that Sam may have actually been murdered. Talbot's 12 year-old ward, Duke Lowery (Lanny Rees), inherits Sam's ranch, much to the…

Mrs. Ramsey sent Jean Oliver to prison on a false charge. To get even, Jean (disguised as Madame Mystera) plans to kidnap her daughter and turn her into a thief. Love entanglements with a gangster known as "The Fox" and newspaperman Grant complicate her plans.

The adventures of motorcycle cops, from their academy days, to chasing crooked truckers.