Vicente and Margarita are a traditional and middle class married couple whose life is surrounded by a sea of confusion and uncertainty when their children begin to make their own decisions. They have discovered love and will not let their parents tell them what to do or who they have to love. The principles and traditions of the family will be replaced by each of the young people who will represent the different social problems of the time. Thus, the coexistence between them will change without Vicente and Marga can do anything to avoid it.

Lucas, typical average Spaniard, shy, gray and repressed, is married to sanctimonious Enriqueta, so he is always aware of other women, although the couple are already parents of nine children, which is why Lucas will do the unspeakable to convince his wife to take the contraceptive pill, something practically sinful for a practicing Catholic like Enriqueta.