California, 1840s. Wealthy landowner César de Echagüe, secretly acting as El Coyote, the legendary masked hero, continues his fight against the injustices and abuses suffered by the Hispanic population at the hands of the US Army.

A small Spanish town is divided between the upper and lower parts. In the wealthy upper part, all the women are barren. Juan from the poor lower part falls in love with Luz, a pretty girl from the upper side: a girl who must of course be barren.