After Sam’s parents and sister are murdered by four bandits in a raid on their Texas homestead, the seventeen year old decides to ride south with his uncle, Marshal William Grant. Sam is determined to avenge the deaths of his family members. Across the Mexican border they talk their way into a fortified hideout with the ambitious hope of rescuing a young girl who has been abducted by the same four killers.
Against incredible odds, they manage to escape alive. But the fight is not over – they face a perilous journey back home. Pursued relentlessly across the Rio Grande by the bandits, the group must face one final, bloody battle.