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.
Unfortunately the movie Bar 20 Justice is not yet available on HBO Max.
| Directing | Lesley Selander | Director |
| Production | Harry Sherman | Producer |
| Crew | Russell Harlan | Cinematography |
| Editing | Robert B. Warwick Jr. | Editor |
| Art | Lewis J. Rachmil | Art Direction |
| Crew | Harry Redmond Jr. | Special Effects |
| Writing | Arnold Belgard | Screenplay |
| Crew | Harrison Jacobs | Additional Dialogue |
| Writing | Clarence E. Mulford | Story |
