When Emily Marr begins an affair with her married neighbour, the celebrated surgeon Arthur Woodhall, she has no idea of the tragedy and scandal their actions will cause. With shattering speed, she becomes the object of a media witchhunt, her only choice to change her identity and vanish.
Soon after, Tabby Dewhurst arrives on the Ile de Re in France, estranged from her family and unable to afford even a room for the night. By chance, she meets Emmie Mason, whose offer of friendship is at odds with her obsession with privacy. As Tabby sinks deeper into Emmie’s strange, hidden world, she begins to form suspicions – suspicions that will lead her back to England and to a revelation so shocking she must question everything she knows.