Alice is one of a group of obsessed recreational swimmers for whom their local swimming pool has become the centre of their lives - a place of unexpected kinship, freedom, and ritual. Until one day a crack appears beneath its surface ... As cracks also begin to appear in Alice's memory, her husband and daughter are faced with the dilemma of how best to care for her. As Alice clings to the tethers of her past in a Home she feels certain is not her home, her daughter must navigate the newly fractured landscape of their relationship. A spellbinding and unforgettable novel about mothers and daughters, grief and memory, love and implacable loss.