Brad King

Jimmy's father, a rancher, died in suspicious circumstances. To make things worse, Jimmy's disreputable undcle has a plot to take over the ranch. Jimmy turn to his friend Brad, the Marshal, for help.

Hoppy, Johnny and California go to Arabia to buy some horses. There they get involved with a sheik and a harem and a kidnapping plot.

Some Easterners intend to seize a tract of valuable timber land. Hoppy must try to stop them before they blow up a major dam and achieve their goal.

When cattle rustlers trouble a rancher who once was part of the Bar 20 crew, Hopalong Cassidy and the rest of the gang join forces to bring them down.