Following a shocking incident near the riverbank, the investigation into Katie's disappearance intensifies. Sarah openly accuses Fabien Morvan of being involved in the events surrounding Katie's disappearance, and also publicly links Katie's disappearance to the earlier case of Odile Lambert, forcing local authorities to confront questions that have lingered for years. Tensions grow among several people connected to the case as long-buried secrets threaten to surface, and relationships within the police force also begin to strain. Sarah receives a shocking new message that suggests Katie's story may not yet be over. A disturbing discovery leads investigators back into the woods. As suspicion spreads through Saint-Michel and the list of possible suspects grows, Lieutenant Virginie begins to suspect that the truth about both disappearances may lie closer to home than anyone expected