Imperial St. Petersburg. End of the 19th century. The nobleman Konstantin Matveev decides to pass the time and goes for a walk in the park, where an enterprising engineer placed a balloon for all to see.
Konstantin becomes a hostage of an unlucky thief and makes a forced trip in a balloon. The new-fashioned device crashes and Konstantin, who has lost his memory, finds himself in a distant estate. It is only by a miracle that he manages to avoid an unwanted marriage and escape from the tenacious hands of the newly made bride.
Returning to St. Petersburg, Konstantin learns that his beloved aunt died and bequeathed to him a huge estate and bank deposits. Entering the rights of inheritance, the young nobleman did not even suspect that he will go to his aunt's estate and reveal her secret. But the main thing: during a horse ride through the forest, he will meet the stunning 'Diana the Huntress', who wounds him right in the heart with her arrow.