Deep in the mountains of north-east Scotland lies Glen Conach, a place of secrets and memories, fable and history. In particular, it holds the stories of three different eras, separated by centuries yet linked by location, by an ancient manuscript and by echoes that travel across time. In ancient Pictland, the Christian hermit Conach contemplates God and nature, performs miracles and prepares himself for sacrifice. Long after his death, legends about him are set down by an unknown hand in the Book of Conach. Generations later, in the early nineteenth century, self-promoting antiquarian Charles Kirkliston Gibb is drawn to the glen, and into the big house at the heart of its fragile community. In the present day, young Lachie whispers to Maja of a ghost he thinks he has seen. Reflecting on her long life, Maja believes him, for she is haunted by ghosts of her own.