Fellside is a maximum security prison on the edge of the Yorkshire Moors. It's not the kind of place you'd want to end up. But it's where Jess Moulston could be spending the rest of her life. It's a place where even the walls whisper. And one voice belongs to a little boy with a message for Jess. Will she listen? A haunting new thriller from the author of the word-of-mouth bestseller The Girl with all the Gifts.