On the verge of her fortieth birthday and shaken by a recent miscarriage, Emily inherits an abandoned summer camp in Massachusetts. She and her husband move onto the property and make grand plans to revitalize the land. But they soon discover that their inheritance includes an unexpected guest. On a walk through the old campgrounds she once frequented as a girl, Emily finds, living undetected in one of the cabins, a magnetic twenty-two-year-old named...