The prologue to the opening episode takes place on a bench in a park above Prague where a distraught young woman is sitting. She is the first of the patients of psychologist Marek Posta (Karel Roden). Her name is Sandra (Tatiana Pauhofová), she works as a nurse and has been receiving therapy for six months. After she gets over a fit of weeping in the psychologist's consulting room, she tells him about her experience the night before. She had had a tiff with her boyfriend Ondrej and he had given her an ultimatum involving their relationship, and she went with her female friend to a bar where she embarked on a sexual adventure with an unknown man. After she recapitulates the problems with Ondrej, Sandra makes a surprising confession: She has been in love with Marek for some time and longs for their sexual contact. Taken aback, the psychologist explains to her that the dividing line between him and his clients is sacred to him.
—HBO Europe