[1] The main heroine of the picture Polina is pursued by strange dreams, in which she is invited to go through a living flower on the doors of an ancient castle.

At the same time, some pages of the book are initially empty, with scenes from the dreams and life of Polina appearing on them as events unfold.

Their relationship develops and when they have a disagreement, Polina, wandering around the city, meets the man who was the dark horseman in her dreams.

At the spot, the man gives her a white dress which she should change into and places her on the altar with the intention of serving her as a human sacrifice.

Sasha, who is asked for help by fortune teller Nastya, manages to notice how Polina leaves with a stranger and follows them by taxi After getting into the castle, Sasha fights against the man in black, and as a result he manages at first to gouge the stranger's eye and then to drop the adversary from an extreme height with him plunging into the surrounding stakes.