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.
In Madrid during the fifties' the calm life from some neighbors will be changed since the arrival of Antonio, a man without scruples who lives running the risk.
Madrid, late 19th century. A wealthy woman is found murdered in her home and her maid seems to be the main suspect; but her statement further entangles the case.