The phenomenal new thriller from the multi-million-copy bestselling author of Before I Go To Sleep. Blackwood Bay. An ordinary place, home to ordinary people. It used to be a buzzing seaside destination. But now, ravaged by the effects of dwindling tourism and economic downturn, it's a ghost town - and the perfect place for film-maker Alex to shoot her new documentary. But the community is deeply suspicious of her intentions. After all, nothing exciting ever happens in Blackwood Bay - or does it? Blackwood Bay. An ordinary place, home to an extraordinary secret.