Albert Salmi is the sole survivor of an Indian battle who decides to live as an Apache. Needing to fulfill an Army contract for the sale of horses, John Cannon, Buck, Manolito and Wind head for Indian country to round up a wild herd. Confronted by a tribe of embittered Apaches led by White Horse and Red Eagle, Cannon is allowed access to the herd only on condition that White Horse accompany the group with Buck left behind in the Apache camp.