Bells of Rosarita

Dale Evans inherits a circus, but her dead father's partner (Withers) is trying steal it away from her for himself.

Roy Rogers and Bob Nolan happen to be filming their latest movie on location at the circus when they learn of Dale's plight. Roy and Bob call on some of the most famous western movie stars of the day, and their famous horses, to come to the circus and put on a celebrity circus show.

The show is a hit, saving Dale and the circus, and the bad guys lose in the end.