Arriving on the windswept Ile de Ré, Tabby Dewhurst is unable to even afford a room for the night. Overhearing a villager repeating the access code to her front door, she lets herself into the house, and so she enters the strange, hidden world of Emmie, whose sudden offer of friendship is at odds with her obsession with privacy. Tabby begins to form suspicions about Emmie, suspicions that lead her to a scandal with shattering consequences.