On a winding road in the Pyrenees, a spectacular car accident leads to a miracle: the reappearance of Anna, a teenager who disappeared 5 years ago. Captain Alix Ber and Commander Balthus are deployed alongside Victor Ferrer, the head of the local gendarmerie, to find Lucie as quickly as possible, a young girl who was kidnapped at the same time as Anna and who has not reappeared.