At the same time Lena Barmina 's personal drama is unfolding , who falls in love with the married elderly plant director Vasily Chernykh .
Well - known scientist Professor Barmin and his daughter Lena begin to fight for the preservation of the unique ecosystem of the lake .
At the same time Lena   's personal drama is unfolding , who falls in love with the married elderly plant director Vasily Chernykh .
Well - known scientist Professor Barmin and his daughter Lena begin to fight for the preservation of the unique ecosystem of the lake .