Once on the Epiphany holiday, when the moon and stars had already dotted the whole sky, two friends - Nastya and Lida - decided to tell fortunes. Lida once found a book with fortune-telling in her grandmother’s closet, where, in addition to the usual ones used since ancient times by girls in Rus', there were also dangerous ones, for example, with a mirror. This fortune telling is still considered one of the most terrible, so the grandmother did not allow her granddaughter to use this book. But Lida was persistent, she persuaded her grandmother to give her the book and swore that she would not tell fortunes in front of the mirror. Nastya nevertheless took a risk and performed a fortune telling with a mirror, after which she found herself in a parallel world, shrouded in mysticism. There she meets the ruler - Lucifer. After this, very strange things began to happen to the girl.