On a Texas ranch sharing a border with Mexico, two families are about to collide. While out on a border patrol, rancher's son Jackson Greer accidentally kills a Mexican immigrant boy. When his father tries taking the blame, Jackson flees south on horseback, becoming a gringo "illegal alien" in Mexico. Pursued by both Texas Rangers and Mexican Federales, he journeys across Mexico to seek forgiveness from the dead boy's father…only to fall in love with the land he was taught to hate.