Sadie and Will Foust have only just moved their family to Maine when their neighbour, Morgan Baines, is found dead in her home. As the eyes of suspicion turn toward the new family, Sadie is drawn deeper into the mystery of Morgans death. But Sadie must be careful, for the more she discovers about Mrs. Baines, the more she begins to realize just how much she has to lose if the truth about her troubled past ever comes to light.