Six hours of Piper Bartlett's life went missing the night her cousin Elsie drowned—or so the town of Redwater, Indiana decided. Five years on, the state is draining the quarry to build a reservoir, and the divers surface with a chained body that isn't Elsie's. An anonymous note tells Piper she was there, holding the light. Eleven days before the water returns, she has to recover a memory someone in her own house will kill to keep buried.