Romanzo Fernandez, a vaquero noted for his bravery, courage and honesty, is appointed Chief of Scouts on the Mexican border, which is infested by Rock and his rustlers. Rock visits Mary Burke's ranch, with a view of stealing her cattle, and incidentally makes love to her. Fernandez appears. Mary has never met him and being attracted by his picturesque costume, asks for an introduction which Rock grudgingly gives, Fernandez being his old enemy. Mary and Fernandez are mutually attracted, much to the disgust of Rock, who later has his rustlers steal a bunch of her cattle, and while she is out riding she accidentally stumbles across one of Rock's camps. She realizes then for the first time he is a cattle rustler. Rock insults her but she gets away from him. He gives chase with some of his men. Fernandez having been warned of the cattle stealing by one of his scouts comes upon the chase, gets the girl under cover in the rocks and requests her to go for help while he holds the rustlers off. The girl secures aid from some prospectors who return and overpower the rustlers. Fernandez, who has been shot requests that he be permitted to smoke a cigarette. With a puff and a smile he sinks into Mary's arms, dying as he lived, "a man."
—Moving Picture World synopsis