Rosana is an attractive teacher who is losing his youth with such discipline in the study. When suddenly bursts into his life a perfect cheeky who lives of game and odd jobs as photographer, but wants to acquire a little culture for personal reasons. So he hires the services of the best teacher of the place ...

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.