A breath-taking missing persons thriller set under the menacing peaks of the Pyrenees Five years after their disappearance, the village of Monteperdido still mourns the loss of Ana and Lucia, two eleven-year-old friends who left school one afternoon and were never seen again. Now, Ana reappears unexpectedly inside a crashed car, wounded but alive and next to the body of a man. While the people of the village struggle to comprehend the startling turn of events, the case reopens and a race against time begins to discover the identity of the dead man and who was behind the girls' kidnapping. Most importantly, where is Lucia and is she still alive? Inspector Sara Campos and her boss Santiago Bain, who are called in from Madrid's head office, are forced to work with the local police. Five years ago fatal mistakes were made in the investigation conducted after the girls first vanished, and this mustn't happen again. But Monteperdido has rules of its own.