The brain of a male engineer is transplanted into a female’s body. He soon finds it very frustrating to cope with the daily sexist discrimination most women deal with. For example, he is surprised when no one will hire a female engineer. When he is faced with dealing with female sexuality, he quickly begins exhibiting lesbian tendencies.
The film follows the adventures of several couples in Spain in the early 70s, whose stories intermingle: Luis is an unfaithful husband to his wife Juana, Felipe is a plumber who seeks extra-spousal adventures to hidden from his wife, Rosario, who works as an assistant. Ramón is a pathological jealous whose obsession is that his girlfriend Charity confess the hypothetical adventures he had with other men before meeting him, Irene is a jealous wife of her husband, Carlos, whose professional life gives him numerous opportunities for infidelity, Domin he is a pimp who frequents the brothels of Madrid .