Returning home from a visit to her father's ranch, Victoria and her escorts Sam and Pedro find infant Joey, the only survivor of an Indian raid on his parent's wagon. When the boy's grandfather, Dan Casement, spared only because he had gone ahead to scout for water, insists on leaving with the child, a concerned Victoria balks, insisting that she can better care of the baby en route to the safety of the Cannon ranch. Relenting, Casement joins them in their slow trek across the desert while Indians stalk them, awaiting the best time to attack.

Embittered over the loss of his home and grandson in fire during a bandit raid, Casement vows to track down Reese, Gail and Wiley, the men responsible. He trails them to Tucson where his friends of the Chaparral offer to help, but the determined Casement wants to face the men alone.