Arithmetic of Meanness

Classmates Marina and Varya have a common history. Once, Marina’s father and mother Varie had an affair, after which Boris returned to the family, and Lyudmila’s life went downhill. Varya, forced to work on the panel to have at least some money, hatches a plan of revenge. She strikes up an affair with a physical education teacher Bones, with whom Marina is in love, and soon announces to him about her pregnancy. Kostya proposes to Vara, but during the wedding it turns out that Marina is waiting for a child from Kostya.