For his whole life, the boy has lived underground, in a basement with his parents, grandmother, sister, and brother. Before he was born, his family was disfigured by a fire. His sister wears a white mask to cover her burns. He spends his hours with his cactus, reading his book on insects, or touching the one ray of sunlight that filters in through a crack in the ceiling. Ever since his sister had a baby, everyone's been acting very strangely.