When Joe Thorne was fifteen, his little sister, Annie, disappeared. At the time, Joe thought it was the worst thing in the world that could ever happen. And then she came back. But she couldn't, or wouldn't, say what had happened to her. Now Joe has returned to the village where he grew up, to work as a teacher. Joe has bad debts - and bad people - he needs to escape. He's also received an anonymous email: I KNOW WHAT HAPPENED TO YOUR SISTER. But coming back to the place he grew up means opening old wounds, and confronting old enemies and the things they did. Joe is about to discover that places, like people, have secrets. The deeper you go, the darker they get. And sometimes, you should never come back.