Doctor Tom Vansant's world collapses when his fourteen-year-old daughter Louise suddenly disappears. Eighteen months later, Tom is still desperately searching for traces of his daughter when one night he meets sixteen-year-old Charlotte. The girl turns out to have run away from home exactly eighteen months before and Tom becomes convinced that she knows more about his daughter. He follows Charlotte to Bergmont, a small Ardennes village in the middle of the woods, and ends up in a strange, closed world. Despite all the opposition, Tom makes one startling discovery after another and uncovers the secrets of Charlotte and Bergmont.