Mexican bandit El Lobo breaks jail and plots to plunder the Cannon Ranch supplies to avenge his imprisonment by Manolito. When heavy rain prevents wagons from reaching the ranch with needed supplies, Buck, Billy Blue, and Manolito attempt to get a mule train through. El Lobo traps the group in an isolated canyon.
Elenco: Henry Darrow , Cameron Mitchell , Leif Erickson , Mark Slade , Don Collier , Linda Cristal , Roberto Contreras , Frank Silvera , Rodolfo Acosta , Rudy Ramos , Robert Hoy , Ted Markland , Jerry Summers .