After the Civil War, increasing numbers of white settlers struggled with the Indians for land on the plains - a situation tailor-made for Major Samuel Burkhalter's dreams of personal glory. But Lt. Martin Keefe saw the Major's ambition ruin his father's career, and now it is threatening his own. And Joe Moya's wife and children were killed in a massacre by the Major's troop. Hungry for revenge, Moya arranges an ambush at Rialto Creek.