Hopalong Cassidy (William Boyd) comes to the aid of a rancher involved in a range war, but learns the rancher heads an outlaw gang. Windy: George "Gabby" Hayes. Johnny: Jimmy Ellison. Trumbull: Sidney Blackmer.
Boyd and Ellison lend a hand to ranch owner Gabriel, who is involved in a fence war with neighboring rancher Blackmer. The highlight is a cattle stampede brought under control by Boyd's careful use of dynamite charges.