Alina and Polina are teenage twins. For as long as Alina remembers herself, they did everything together and were so inseparable that she used to feel like a reflection of her sister - as if she were looking in a mirror. The game-ritual, invented by Polina, securely secures this role for her, but everything changes when Oleg appears in the life of the twins - a new one in their city and school. Polina seems to have feelings for Oleg, but Alina sees that her sister is moving away, and for the first time she becomes uncomfortable in the role of a reflection. Will Alina be able to find herself, and will the school psychologist help her in this?