An amazing, bewitching and dramatic story of one family: grandmother, mother, father, adult daughter, eldest son and little boy. All these people live in the basement, the faces of the adults were disfigured by the fire in the fire. And the daughter even wears a mask to hide features that can cause horror even among relatives. The family locked in the basement seems to be happy in their own way, but their lives are poisoned by a secret that the adults have been keeping for many years. Gradually, the boy awakens to a desire to get out of the basement, to see life outside, that huge world where fireflies live, which he knows about from books. He even manages to lift the veil of secrecy. But in life it often happens that what seems to be one thing actually turns out to be completely different...