Eugenia knew: an old country estate with the unusual name Mukhina’s Dacha was out of their budget for her and her husband. But she felt something strange: they had to live there no matter what! During her first visit to the estate, Zhenya went down into the basement, where she found a door with no handle and no keyhole. Where does it lead and what does it hide? Then she noticed the shadow of some creature—either a person or an animal… These mysterious incidents by no means frightened the girl—she understood that she had to uncover all the secrets of the mysterious house. And by some incredible turn of circumstances, Eugenia and Artem became the owners of Mukhina’s Dacha! However, the mansion was in no hurry to reveal its secrets to them. Not until Eugenia discovered in an old safe the diary of her namesake, who had lived in the house a hundred years earlier…