In 1877 Colorado Territory, a young woman, Cresta Lee, and young U.S. Private Honus Gant are joined together by fate when they are the only two survivors after their group is massacred by the Cheyenne. Gant is devoted to his country and duty; Lee, who has lived with the Cheyenne for two years, is scornful of Gant (she refers to him as "Soldier Blue" derisively) and declares that in this conflict she sympathizes with them. The two must now try to make it to Fort Reunion, the army camp, where Cresta's fiancé, an army officer, waits for her. As they travel through the desert with very low supplies, hiding from the Indians, they are spotted by a group of Kiowa horsemen. Under pressure from Cresta, Honus fights and seriously wounds the group's chief. Honus finds himself unable to kill the chief and the chief's own men stab him for his defeat and leave Honus and Cresta alone.