Lena tells a story of a young, pregnant girl who lives in a Warsaw’s tenement. Tired of being constantly left alone in her flat, she develops paranoia: she starts hearing someone breaking in and sees words written on the mirror telling her to abort a child. Crushed by this unreal experience, she turns against her mother and the father of her child – Konrad, claiming they are responsible for all the bad things in her life. As it turns out later, Lena is more right than everyone thought before.