A male student begins a torrid affair with his female teacher, but she soon realizes that the relationship won't get them anywhere.

In a small town where nothing ever happens, the inhabitants learn about a place at the edge of the earth where money and women are abundant. When they see the oportunity to go and work illegaly in the United States, they jump at the chance. Meanwhile Andrés and Gregorio go to the town searching for treasures and they only find Matilde, the rest of the women in the town left, tired of waiting for the men to return.

Three stories about three high middle class women from Mexico City who are unfaithful to their partners. 1) Julieta is a married with Eduardo, a publicist addicted to work. 2) Clara is a capricious and fickle girl who is committed to marry Ricardo, a lawyer, until she meets Alfonzo, the architect in charge of remodeling the apartment where the couple will live when they get married. 3) Mariana and Rafaela are married for 10 years and have a daughter, but she is dissatisfied with their marriage until she decides to contact Armando, a man much older than her, through a magazine contact.