Dan Frazier is a U. S. Border Patrolman on the California-Mexico border whose hot temper and ready-fists keep him in trouble, both of which indirectly lead to the death of a fellow trooper. He resigns from the force in order to find out who was responsible. He believes it was a gang of smugglers, engaged in smuggling illegal aliens into the United States from Mexico, and in order to get inside the gang he fakes smuggling activities.
| Actor | Role |
|---|---|
 Paul KellyDan Frazer | Dan Frazer |
 June LangHelene | Helene |
 Billy GilbertNick Mendoza | Nick Mendoza |
 Lyle TalbotJack Scott | Jack Scott |
 John HamiltonJack Rogers aka 'Lefty' | Jack Rogers aka 'Lefty' |
 Cliff Nazarro'Shakespeare' | 'Shakespeare' |
 Ivan MillerCapt. Ellis | Capt. Ellis |
 Maurice Murphy'Kansas' Nelson | 'Kansas' Nelson |
 Dewey RobinsonRiley | Riley |
| BBruce MacFarlaneBuck | Buck |
 Christian RubMr. Nelson | Mr. Nelson |
 Frank PugliaChief Miguel | Chief Miguel |