Harry and Madeleine Winslow have been blessed with talent, money, and charm. One weekend at the start of the summer season, Harry and Maddy, who are in their early 40s, meet Claire and cannot help but be enchanted by her winsome youth, quiet intelligence, and disarming naivety. Drawn by the Winslows' indescribable magnetism, Claire eagerly falls into their welcoming orbit. But over the course of the summer, reverence transforms into dangerous desire.