A mother tucks her twin daughters into bed-only to find the next morning that one is missing. No forced entry. No sign of struggle. And everyone in the house swears they didn't hear a thing. As the police investigate, secrets unravel: the father's mysterious late-night disappearances, the neighbor's strange obsession with the girls, and the mother's own buried past. But the deeper she digs, the more she begins to fear the truth: maybe her missing child never existed at all.