The appearance of Alexandra, the daughter of the famous traveler Count Volotsky, in the secular society of St. Petersburg is tantamount to a volcanic eruption. She has no equal not only in beauty and intelligence, but also in her ability to ward off unwanted suitors and put down arrogant social dandies. And only the young Prince Adashev did not pay any attention to the young beauty. The restless Alexandra decides to punish the prince for this, and soon a new governess appears in his house - nondescript, in an old-fashioned dress and an absurd cap. What will this girl become for Kirill Adashev - a real punishment from the Lord or, conversely, a gift from God?