A descendant of the once rich Morozov family orders an old plan of his manorial estate from the archives of a provincial town. Sonya, the head of the archives department, fulfills his request, but after a while the person who ordered the documents dies at the hands of an unknown killer. The plans for the ancient dungeons remain with Sonya. And the life of the ugly woman vegetating among old papers changes dramatically. The search for an ancient treasure, dangerous wanderings in the crumbling dungeons of a ruined estate, the appearance of the man of Sonya’s dreams! all the cards for treasure hunters...