Four friends hike out into the beautiful Norwegian wild - nothing between them and the mountain peak but forest, sea and sharp blue sky. But there's a darker side to the wilderness. A woman went missing here a year ago, scarring the mountain with suspicion and unanswered questions. Now, the friends are hiking into the heart of the mystery. And waiting on the trail is someone who'd do anything to keep their secrets buried - and to stop the group walking away alive. From the author of 'One of the Girls'.