Dr Péter Gergely, assistant professor at the University of Budapest, and his wife Mária celebrate their wedding anniversary. They are listening to Tchaikovsky's Symphony No. VI when he is called in sick. Left alone, she goes to an address given by an unknown caller, where she finds her husband in the arms of a strange woman. She does not believe in her husband's innocence, divorces him and marries the lawyer Dr. Tibor Máté, who has been besieging her for years. In despair, Peter attempts suicide...