Hopalong Cassidy, boss of the Bar 20 ranch in Texas, rides down the Camino Real in the New Mexico cattle country near Alamogordo, in response to an urgent message from his lifelong sweetheart, Nora Blake, who is in serious trouble. Before he and his saddlemates, "Lucky" Jenkins and "Pappy", can reach her ranch, they are stopped by Clay Allison, a cattle-rustler who is in almost complete control of the district, and wants to extend his holdings by seizing Nora's cattle and driving her out. Seeing Cassidy as a menace to his plans, he has him arrested on a trumped-up charge. Cassidy and his pals shoot their way out of the trouble and reach Nora;s ranch where they learn that Allison's henchmen have murdered her foreman, Tom Dillon, and Allison has sent for a crew of outlaws on the Texas border.
| Actor | Role |
|---|---|
 William BoydHopalong Cassidy | Hopalong Cassidy |
 Russell HaydenLucky Jenkins | Lucky Jenkins |
 Frank DarienPappy | Pappy |
 Nora LaneNora Blake | Nora Blake |
 Robert FiskeClay Allison | Clay Allison |
 Carleton YoungJeff Caffrey | Jeff Caffrey |
| MMargaret MarquisMary Dillon | Mary Dillon |
 John ElliottTom Dillon | Tom Dillon |
 Gertrude HoffmannMa Caffrey | Ma Caffrey |
 Ed CassidySheriff Hawley | Sheriff Hawley |
| GGordon HartJudge Belcher | Judge Belcher |
 Charles MurphyTex, leader of Texas gang | Tex, leader of Texas gang |
| JJohn BeachBar 20 Cowhand in Check Shirt (bit) | Bar 20 Cowhand in Check Shirt (bit) |
| WWen WrightBar 20 Cowhand (extra) | Bar 20 Cowhand (extra) |
 Jim ToneyBar 20 Cowhand (extra) | Bar 20 Cowhand (extra) |
| BBud McClureTexas Outlaw (extra) | Texas Outlaw (extra) |
| GGeorge PluesTexas Outlaw (extra) | Texas Outlaw (extra) |
 Dick BotillerTownsman (extra) | Townsman (extra) |
| RRoy BuckoTownsman (extra) | Townsman (extra) |
| TTom SmithTrial Spectator (extra) | Trial Spectator (extra) |