She only had one task. "Look after your sister..." Up ahead, there was a fork in the road. Two paths leading to the same location. Thora went down one and her little sister Theresa went down the other. They should have met up at the same spot a few minutes later. But Theresa was never to be seen again. Now almost 30 years later, Detective Thora Nightingale is called in to investigate the disappearance of two children who have gone missing on the same road as Theresa did, all those years ago. As the townsfolk begin to search the nearby forest, people speculate that there must be a simple explanation. But as Thora already knows, there is nothing simple about this road...