Boris Yamyshchik, a writer of “horror literature,” one day says: “My light, my mirror! Tell me…” — and the mirror answers him. From that moment on, Yamyshchik’s life takes a sharp turn. The reflection behaves in the most unpleasant way, turning the original’s life into a nightmare. His loved ones are in danger; someone has already been seriously hurt, and it’s urgent to find a way to tame the nasty double. Will Yamyshchik manage to deal with the reflection, which has designs on its owner—or will resistance only make the already bad situation worse?