No Entry for the Supernatural

In St. Petersburg, children are disappearing — without witnesses, without traces. No one can find them: neither the police, nor volunteers, nor… the Institute of Hypothetical History, which protects people from supernatural forces. Margo, a tenth-grader, also loses her sister... and sets out to search for her. But she finds Vasily, a young restorer who has gotten into trouble after an encounter with beings from another world. They realize that the oddities happening in the city are interconnected. Only the staff of the Institute can help them make sense of it all. Sensing paranormal activity, they reach out to the young people. Together, they find themselves drawn into a game of the Supernatural, from which they can only emerge alive under one condition — unraveling the knot of history. What secrets does St. Petersburg hold?