When half-sisters Lauren, Flora, and Kat are unexpectedly summoned to the Cornish house where they spent their childhood summers, it's the first time they've dared return. Because the wild cliffs and windswept beaches hide a twenty-year-old secret. The truth about what they did. Someone who remembers them lurks in the shadows, watching their every move. And there are other secrets, even darker than their own, waiting to be unearthed . . .