A series of adventures set under the Big Top.
With Mickey Braddock as Corky, Noah Beery as Joey, the Clown, Robert Lowery as Big Tim Champion, Guinn Williams as Pete the Canvasman, Bradford Jackson as Billy Benson, John Reach as Earl Stanton, John Crawford as Matt, Stanley Andrews as the Sheriff.

Billy Benson, known as the Masked Marvel, is wrongly accused by everyone except Corky of robbing the circus box office.