When Dick Bristow, an American mining engineer, discovers a rich vein of copper in an isolated desert region of old Mexico, he shrewdly secures an option on a large tract of land surrounding his claim from Julian Marr, an unprincipled mine and railway owner. The property is actually part of an estate belonging to Marr's ward and niece Janet, and when Bristow begins to build a railway to transport the ore from his holdings, Marr soon suspects that the land may be valuable. By underhanded methods he attempts to convince his niece to sign over her property to him, but she refuses. Marr then hires a band of outlaws to kidnap Bristow and hold him prisoner until his option expires, but Bristow escapes and after a gun battle stumbles wounded into Marr's office. Just as Marr pulls a revolver on Bristow, Janet appears and demands that her uncle go through with the deal. Marr complies, and a business as well as love alliance is formed between Janet and Bristow.—AFI