Katya has no one closer and closer than her mother. But she disappears. Following a black cat, Katya finds herself at the end of the 16th century, in the Siberian town of Tavda, in the house of her great-great-grandmother, the famous witch. She will have a dangerous journey to ancient Arkaim, where she will see not only student life, but also become a student of the Magi Stara herself. And in the footsteps of the girl are hunters for antiquities...