Jilted by his sweetheart, Bob Fordyce, a Texas cowboy, leaves home and goes farther west. In San Miguel he gets into an argument with one of the followers of the Cibelo Kid, a notorious outlaw, who draws his gun and cold-bloodedly shoots him. When his mother and brother, Clay, hear of his death, the latter vows to avenge it, and, going to San Miguel, he also is wounded in an altercation with the Kid. He takes refuge at Doc Booth's ranch, and in order to make old man Booth give him up, the Kid captures Freda, his only daughters, and takes her to the outlaws' mountain stronghold, and there keeps her prisoner. The scenes are, by the way, very fine indeed.
—Moving Picture World synopsis