Union officer Kirby Yorke trains new recruits at an outpost on the Rio Grande, including his long-lost son, while battling the Apaches. His mother tries to take his son away, but he decides to stay and fight. Meanwhile, Kirby and his former lover Kathleen rekindle their romance, but his unorthodox plan to defeat the Apaches puts his honor and family at risk.

Rio Grande
A troubled cavalry officer faces a treacherous Apache menace on the Rio Grande, while also grappling with family drama surrounding his wayward son and estranged wife.