Watch Rio Grande

In 1877 Captain Kirby Yorke commands a cavalry regiment at Fort Starke, a United States Army post near the Rio Grande. Estranged from his wife and son, Captain Yorke is surprised when his son shows up as Private Jefferson Yorke. Private Yorke's mother arrives soon after in hope of getting him out of the Army and taking him home. Captain Yorke and his wife realize that they are still in love. Yorke shows his son no favor until Private Yorke demonstrates heroism by rescuing white children captives of the Apache.