In a quiet town in the Ardennes area, a sixteen-year-old girl called the teacher late at night and walked into the forest alone, vanishing without a trace. The person in charge of investigating the case was Sheriff Gaspar Dirk, a single father who was a former soldier, who had just been transferred here.He launched an investigation with local policewoman Virginie Musso.And the young and withdrawn teacher, Eve Mendel, helped them find the truth.She was found in the same forest in her childhood, alone and silent. It was the doctor in the town who brought her back from the fog.Her past is like a layer of mist, always shrouded in the memory of this village.