Lazare and Maddi have every reason to believe that Tom didn't die in the storm, and the investigation turns to a possible kidnapping. As the hours pass, anxiety mounts: where is Tom and who is holding him captive? Will Maddi find him before it's too late?

Tom's mother, Amandine, narrowly escapes an attempted murder. But the relief is short-lived: Tom has disappeared. As a snowstorm hits Murac, will the search lead to the young boy's recovery?

A new body is discovered, placing Maddi at the center of suspicion. Maddi's past relationship with Lazare forces the latter to let his assistant Ludo lead the investigation. Evidence mounts against Maddi, raising doubts: could she ultimately be responsible for all this?

When Tom is the victim of a serious accident, Lazare's investigation focuses on Jonas, the boy's father. Maddi shares a disturbing discovery about Tom with Sabine and Nectaire. The link to Esteban is obvious; could Jonas be linked to his death ten years earlier?

A murder rocks Murac, where Lazare, Maddi's ex and father of their son Gabriel, leads the investigation. Maddi discovers that Tom has flashbacks to Esteban's life. She calls on Dr. Halawi, a child psychiatrist, to try to understand what could link the two boys...

Ten years after the death of her son Esteban, Maddi meets Tom, a young boy who looks strikingly like him. Intrigued, she moves from her native Basque country to be closer to Tom in Auvergne. A series of murders rocks the peaceful region. Are these events linked to her son's death?