When the riders of the Bar 10 run up against an escaped prisoner and his ruthless gang, they find themselves in deep trouble. Bret Jarvis and his henchmen are heading to Mexico when they learn that the Circle J ranch have returned from a profitable cattle drive and are heavy with loot, making them a sitting target for a raid. But Gene Adams and his Bar 10 cowboys are soon in hot pursuit and all they need to do is stop the outlaws before they reach the border ...