After the dark events that scarred her childhood, Kier Templer escaped her hometown and twin to live her life on the road. They`ve never lost contact until, on a trip to a Portuguese national park, Kier vanishes without a trace.
Detective Elin Warner arrives in the same park ready to immerse herself in its vast wilderness - only to hear about Kier`s disappearance, and discover a disturbing map she left behind. The few strangers at the isolated camp close ranks against her questions, and the park`s wild beauty starts to turn sinister.
Elin must untangle the clues to find out what really happened to Kier. But when you follow a trail, you have to be careful to watch your back...