Sergeant Carlos Olivarez of the Mexican Rurales (police) suspects a North American named Clark of complicity in a land swindle. He believes the woman Consuela to be in league with Clark, and further believes her responsible for the seduction and betrayal of Carlos's brother Juan, who commits suicide. Carlos befriends young Ramon Ruiz and his family, but discovers that Ruiz's intended bride is none other than Consuela. Carlos sets out to disrupt the duping of Ramon's family by Consuela, Clark, and their vicious henchman Pedro.