Watch Online Free FlixHQ. To avenge the death of a small child, a group of ranch workers attempt to steal an infamous racehorse named El Diablo de la Frontera (The Devil of the Border) from a rich and powerful woman and her son. Meanwhile, the horse -- an animal that's been unbeatable against any and all challengers -- rides again in a high-profile match against a formidable opponent. Gerardo Albarran, Salvador Salinas, Armando Infante and Carmen del Valle co-star.