Side Effect: A traumatic experience leads to a break-up between a young married couple. In a desperate attempt to save their marriage, Andrey, the husband, seeks help from a psychic named Mara. His only wish is to make his wife Olga forget the past. Mara's magic works, but the second honeymoon soon turns into a living nightmare... Andrey gradually recognizes that he is dealing with a powerful evil that possesses his wife, and the price of the psychic's service is Olga’s life.