"Many years ago, a witch lived in these forests, and she had three daughters. One day, the daughters—envious of their mother—decided to kill her and take her gift for themselves. Since then, each winter, the witch who hasn’t found peace after death goes hunting, looking for her killers. And if a girl comes across her path, she takes her for her daughter and kills her…"
Such a story is told to each other by students of a private school in the Moscow region, but no one truly believes it until, in the forest, girls begin to be found murdered. The father of one of the students contacts the Institute for the Study of the Unexplained, asking them to find the maniac—because he is sure that these deaths already happened at the school thirty years ago. Voytech and his team will have to untangle a heap of old legends, learn the true story of the ghost of the Black Lady, and try to find the killer before he disappears again for another thirty years.