The beginning of the 20th century. The young couple Vladislav Eschenbach and Sofia Pshebyshevskaya arrive in Tiflis, where sun, wine, ancient architecture and new impressions await them. She is the eternal mistress; it is her trade, her way of life and thinking. He understood this well before their marriage, but he cannot come to terms with her way of life. They are overcome by vanity, by the desire for understanding, and even by despair. For each of them the views of the other are nonsense, but they still try to live together. The outcome of this story seems obvious. But it takes an unexpected turn: in the life of the strange couple there occurs a moment when each of them has to resolve the single most important question.