Emily Bragg, captive of the Comanches, has been with them for years. When a new prisoner is brought to the camp, she befriends and protects her. But when a Comanchero promises to ransom both women, Emily is not sure she wants to leave... When the Penateka Comanches discover the creatures ridden by the invading Spaniards, they wonder if they too could mount them... And a fugitive on a stage bound for Indian territory finds out that his fellow passenger is a U.S. marshal.