<p>After killing a man in self defense Buck Duane becomes an outlaw a companion of the gunfighters and rustlers who live along the Texas border.</p> <p>In a camp on the Mexican side of the river he finds a young girl held prisoner and in attempting to rescue her brings down upon himself the wrath of her captors. Henceforth he is forced to live a lonely life hunted on one side by honest men on the other by outlaws.</p> <p>Then one day a big-hearted captain of rangers takes Buck into his camp wins him a pardon and makes him a ranger pledged to fight for the law rather than against it. The girl whom he attempted to rescue also finds good in Buck.</p>