Engineer Johnny Munroe is enlisted to build a railroad tunnel through a mountain to reach mines. His task is complicated, and his ethics are compromised, when he falls in love with his boss's daughter
| Writing | C.E. Scoggins | Novel |
| Writing | Borden Chase | Screenplay |
| Directing | Richard Wallace | Director |
| Writing | John Twist | Screenplay |
| Camera | W. Howard Greene | Director of Photography |
| Camera | Harry J. Wild | Director of Photography |
| Production | Stephen Ames | Producer |
| Editing | Frank Doyle | Editor |
| Production | Sam Ruman | Production Manager |
| Directing | Grayson Rogers | Assistant Director |
| Sound | John L. Cass | Sound |
| Sound | Clem Portman | Sound |
| Art | Carroll Clark | Art Direction |
| Art | Albert S. D'Agostino | Art Direction |
