A part of the camels' load involves gold coins being sent to Yuma to pay the troops there. Slagle and Wagner worry, wondering how many people know about the gold. On the trail, Elizabeth O'Roark, who is looking for her fiancé, joins them. The soldiers know that he is already dead but do not have the heart to tell her.
A band of Confederate irregulars, headed by gunslinger Todd Dixon, is after both the camels and the gold. The local Apaches also are interested in what is going on and resent the growing hordes of military in their desert homeland.
How will the young corporal and the other cavalrymen make it with outlaws and a band of red warriors out to stop them?