When the disappearance of children and bloody murders multiply in a small mountain village, an old legend shrouded in sulphur reappears... Commander Guardiano and Captain of the Gendarmerie De Rolan are forced to join forces to uncover the truth.
- Genre: Thriller, Horror, Crime, Mystery
- Studio: Phase 4 Productions, Place du Marché Productions, uMedia, Star Invest Films Production, Région Grand Est, Amazon Studios, OCS, uFund, France Télévisions, Palatine Étoile 8, SG Image 2021, Conseil Département Du Loir-Et-Cher, CNC, WTFilms
- Keyword: based on novel or book, child murder, hitchhiker, demon, sanitorium, local legend, child abduction, mysterious disappearance, missing children
- Cast: Virginie Ledoyen, Paul Hamy, Sandrine Bonnaire, Malik Zidi, Emmanuel Lanzi, Christophe Favre