When Max Morden returns to the seaside village where he once spent a childhood holiday, he is both escaping from a recent loss and confronting a distant trauma. Mr and Mrs Grace and their twin children Myles and Chloe appeared that long-ago summer as if from another world. Max grew to know them intricately, even intimately, and what ensued would haunt him for the rest of his years, shaping everything that was to follow.