Partners "Smilin' Bob" Corey and Jim O'Neil are forest rangers sent to peacefully "penetrate" Paradise Valley, which is scheduled to become part of a national park. Although the townspeople are sullen about their presence, they manage to befriend Marie Roselli, an Italian girl whose brother Wolf owns a cattle ranch and from they obtain supplies. Before they; know it, Bob and Jim get caught up in a kidnapping, an illegal logging ring, and a murder.
| Actor | Role |
|---|---|
 Hoot GibsonBob Corey | Bob Corey |
 Louise LorraineMartha McCarthy | Martha McCarthy |
| WWalter PerryJim O'Neil | Jim O'Neil |
 Thomas G. LinghamJacob Lemar (as Tom Lingham) | Jacob Lemar (as Tom Lingham) |
| FFred LancasterWolf Roselli | Wolf Roselli |
 Carmen PhillipsMarie Roselli | Marie Roselli |
 George BerrellDay McCarthy | Day McCarthy |
| BBradley WardMarty Frame (as W. Bradley Ward) | Marty Frame (as W. Bradley Ward) |
 George A. WilliamsMort Frame | Mort Frame |