A troop of rookie soldiers, led by Lieutenant McAllister, must navigate Apache territory to transport ammunition wagons to another fort, accompanied by ex-scout Jess Remsberg. Remsberg is on a personal mission to find Ellen Grange, who has escaped from Apache captivity and is seeking to rejoin her captors.
Duel at Diablo
A diverse group of individuals embark on separate journeys: an Army column navigates Apache territory, an ex-scout seeks vengeance for his wife's murder, and a woman leaves her husband to reunite with her Apache lover.