It's an idyllic New England summer, and Sadie is a precocious only child on the edge of adolescence. It seems like July and August will pass lazily by, just as they have every year before. But one day, Sadie and her best friend play a seemingly harmless prank on a neighborhood girl. Soon after, that same little girl disappears from a backyard barbecue?and she is never seen again. Twenty years pass, and Sadie is still living in the same quiet suburb....