When Ann's granddaughter Ellie asks for her help on a school project on family history, Ann thinks this will be the perfect opportunity to spend time with her. But as they work together uncovering the past, questions about Ann's early life begin to emerge. What did happen to Ann's first child? Was her life with Theo quite as idyllic as it seemed from the outside? And what happened to cause her mother and father's acrimonious split, can she really trust her mother's version of events? And as secrets from the past seem in danger of being exposed, new secrets emerge about Ann's son and daughter-in-law, secrets which threaten to tear the whole family apart. As events unfold in the present day and we learn what happened during a summer thirty years ago, Simmons depicts the unravelling of a family in this gripping psychological thriller.