After ten years away, a 17-year-old girl named Lena Carter returns to her quiet hometown of Ridgewood. She left suddenly after the mysterious disappearance of her childhood best friend, Emily Reeves, who vanished without a trace during a school fair. The case went cold. Now, Lena is back, and things feel… wrong. People avoid her, her house has been vandalized, and someone starts leaving her anonymous messages:“You shouldn’t have come back.”