Mark Lane and Reg Bachelor have been partners for some time, working as ranch hands in Wyoming for the warm part of the year, then heading south before winter sets in. In the fall of 1935, they set out as usual, traveling on horseback down into northern Arizona, where they they are hired to capture the...
wild mustangs who compete with the cattle herds for graze and water. Mustanging, however, is not easy work: it requires patience and cunning and downright grit.
Later, in Mexico, they settle in the tiny village of St. Theresa, working their old trade. But old Honorio Calderon detests everything about gringos, and the mustangs have run * on his land for a long time.
Flor Calderon, his granddaughter, is attracted to Reg, and intercedes on the pair's behalf. However, that may not be enough...