Kostya and Olya are university teachers. On vacation at a sanatorium, Olya found a more respectable partner for herself - Sergey. He is a wealthy man obsessed with a healthy lifestyle and active sports. Upon arrival, Olya leaves a note for her husband and leaves the house, blocking all contact with Kostya. Sergey has a daughter, Sonya. Kostya finds nothing better than to try to start an affair with her... see more