Buck and Manolito invade the Apache stronghold to rescuer a captive white girl. Ann, an Apache slave for five years, is rescued by Buck and Manolito as she flees from her captors, but her frail sister Olive is recaptured. John asks a passing Army detachment for aid, but the unit is massacred before it can help. Buck and Manolito ride unarmed into the Apache stronghold prepared to buy the girl's freedom, but the Apache chief and the medicine man offer to let them go free with the girl if Manolito can survive a test of courage.