The Desert Demon.

After Bill Davis rescues a Native American woman from outlaw Jim Slade, he is lost in the desert, where his horse dies from thirst. Nita Randall, whose father operates a nearby mine, finds Bill in time to prevent him from suffering a similar fate. When Slade plots to take over the mine, Dad Randall kills one of outlaw's men, then dies of an injury. Bill accepts the blame and Nita turns against him. She later forgives and falls in love with Bill after he defeats Slade.