The film is set in 1983. Mária Drazdechová becomes a teacher at a suburban school near Bratislava. She uses her position to blackmail parents of her students to get benefits from them. Students whose parents disobey are bullied and given bad grades. The head teacher is afraid to intervene as Drazdechová is Chairperson of the school Communist Party branch. One of Drazdechová's students attempts suicide as a result of Drazdechová's bullying. This induces the school principal to call the parents for a meeting about a petition to remove Drazdechová from the school. There are parents whose children were bullied by Drazdechová and others who support her. Most of the parents are afraid of Drazdechová's connections and do not want to sign. The meeting ends in failure as only three families sign. It seems that Drazdechová won, but some families then change their mind and return to sign the petition. This results in Drazdechová being removed from school.