Hoppy's friend Dennis owns a rich gold mine. Frazier who owns the adjoining mine and wants the Dennis mine, has Dennis killed. Hoppy steps in to take over running the Dennis mine and learns Frazier's men sneak into and work the Dennis mine at night. Hoppy captures one of Frazier's men only to be captured in return by Frazier and left to die in a burning building.
Hopalong Cassidy
Windy Halliday
Lucky Jenkins
Ann Dennis
Buck Peters
Frazier
Slade
Denny Dennis
Perkins
Pierce
Ross
Miner
Les Martin
Evans
Townsman
Murphy
Frosty
Miner
Miner
Fred
Jim