Balyet takes the reader onto the edge of wilderness in what starts as an ordinary few days' camp-out. There is a fourteen-year-old girl, a Granny to keep track of her and give her annoying tasks, and two interesting young males to distract her with fun and motorbike rides. There is also something else waiting for the girl, Jo, in the wilderness. Because another young woman once was with two brothers here, and met a terrible end, the campout does not proceed in an ordinary way. Instead of light-heartedly flirting and harmlessly exploring, Jo is drawn by mists and echoes toward a very different experience. Why the "sorrow in the hills" wants her, and why Jo is called to it even when she knows the danger, makes for an exciting and haunting story.