Something terrible is happening in class 3A at Calmecatl Junior High. No one can leave the classroom until the guilty party is found. This is the device that gives us a glimpse of the ethics, games, esthetics and eroticism of these girl-women. It is not easy to say what the subject is, there are so many: the discovery of sexuality, discrimination, chance, drugs, maternity, traditions, betrayals, power, love. A mural of a complex reality from the point of view of twenty-something women in the skin of 14 to 15 year old girls.

A married, middle-aged well-known biochemist and university teacher Augusto, leaves his wife, his job and the comfort of his life to go after Marlene, a 14-year-old teenager with extraordinary beauty who burst into his life unexpectedly. One day, Marlene is taken from the custody of Augustus by Genaro, a psychotic sailor, who seduces and finally kidnaps her by taking to the ominous port of Tampico, where Augustus will seek her to try to free her, not without giving her life to pain and atonement, undergoing a deep personal transformation.

A shocking assault inspires horrific violence when a group of teens encounters a girl from their school while camping in a remote spot.

Zequi and Lucy are about to get married. Although he promises not to overdo it during the bachelor party, things get out of control.

After an exhausting search, local authorities manage to capture Angel, who is accused of killing several women. A few months after his imprisonment in the maximum security prison of Malagua, he is questioned by a reporter named: Julio Bocanegra; who is looking for the truth behind the murders in Malagua.