Fripp Island is the perfect destination for Lisa and Scott Daly and their two girls. For Poppy Ford, the resort island is a world away from the one she grew up in. So, when Lisa invites her family to join them, how could a working-class woman turn down a free vacation? But everyone brings secrets to the island, distorting what should be a relaxing summer on the beach. Lisa sees danger everywhere and suspects Scott is fixated on something, or someone, else. Poppy watches her husband and his routines with a sharp eye. Those who return from this vacation will spend the rest of their lives trying to process what they witnessed and the memory of whom they left behind.