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.
| Directing | Julien Maury | Director |
| Writing | Julien Maury | Screenplay |
| Directing | Alexandre Bustillo | Director |
| Writing | Alexandre Bustillo | Screenplay |
| Writing | Alexis Laipsker | Novel |
| Production | Pierre-Marcel Blanchot | Producer |
| Production | Fabrice Lambot | Producer |
| Production | Nora Chabert | Co-Executive Producer |
| Production | Elodie Dupuis | Production Manager |
| Production | Olivier Lambert | Executive Producer |
| Production | Leo Maidenberg | Producer |
| Production | Hervé Pierron | Administration |
| Sound | Raphaël Gesqua | Original Music Composer |
| Art | Tony Andrasik | Assistant Set Decoration |
| Art | Robin Chichoux | Graphic Designer |
| Art | Anne Clément | Assistant Set Decoration |
| Art | Julie Delevoye | Assistant Set Decoration |
| Art | Robin Dervaux | Set Dresser |
| Art | Jean-René Gauthier | Set Decoration |
| Art | Kévin Manson | Assistant Set Decoration |
| Art | Marc Thiébault | Production Design |
| Art | Philippine Valette | Assistant Set Decoration |
| Art | Frédéric Vialle | Set Decoration |
| Costume & Make-Up | Alice Eyssartier | Costume Design |
| Costume & Make-Up | Olivier Afonso | Makeup Artist |
| Costume & Make-Up | Mathieu Capmarty | Key Hair Stylist |
| Costume & Make-Up | Stéphanie Caron | Key Makeup Artist |
| Costume & Make-Up | Marine Despiegelaere | Makeup Artist |
| Costume & Make-Up | Céline Mougel | Hairstylist |
| Costume & Make-Up | Wilfried Pirrin | Makeup Artist |
| Costume & Make-Up | David Scherer | Makeup Artist |
| Production | Léa Barrot | Assistant Production Manager |
| Production | Nadège Courant | Administration |
| Crew | Dave Decottignies | Post Production Supervisor |
| Production | Julien Gayot | Production Manager |
| Directing | Phoenix Alejandrino | Assistant Director |
| Directing | Anacaona Beauzile | Assistant Director |
| Directing | Mickael Denoyer | Second Assistant Director |
| Directing | Samuel Girardin | First Assistant Director |
| Sound | Nicolas Mas | Sound Mixer |
| Sound | Vincent Rochette | Boom Operator |
| Sound | Vincent Rochette | Sound Assistant |
| Sound | Samuel Rouillard | Sound Re-Recording Mixer |
| Visual Effects | Gaël Durant | Visual Effects Director |
| Visual Effects | Tony Kock | VFX Production Coordinator |
| Visual Effects | Kevin Szmir | VFX Production Coordinator |
| Visual Effects | Julien Van De Velde | VFX Supervisor |
| Crew | Manu Lanzi | Stunt Coordinator |
| Crew | Jérémy Margallé | Stunt Coordinator |
| Crew | Pierre-Henri Toubas | Stunt Coordinator |
| Lighting | Jordan Bouchex | Electrician |
| Camera | Nicolas Caracache | First Assistant Camera |
| Camera | Julien Covens | Key Grip |
| Production | Duncan Decottignies | Data Management Technician |
| Camera | Eléonore Huisse | Second Assistant Camera |
| Camera | Sully Ledermann | "B" Camera Operator |
| Camera | Sully Ledermann | Steadicam Operator |
| Camera | Lucie Bojarski | Third Assistant Camera |
| Camera | Félix Marmorat | First Assistant Camera |
| Camera | Cyprien Mas | Grip |
| Lighting | Adrien Pavie | Electrician |
| Lighting | Léo Ponge | Gaffer |
| Camera | Simon Roca | Director of Photography |
| Camera | Mathias Sabourdin | First Assistant Camera |
| Camera | Victor Schmitt | Grip |
| Lighting | Bruno Seguer | Electrician |
| Lighting | Fréderic Toussaint | Electrician |
| Production | Lucie Llopis | Casting Coordinator |
| Production | Renaud Vaudeville | Additional Casting |
| Production | Caroline Wormser | Casting Assistant |
| Costume & Make-Up | Florianne Balay | Costumer |
| Costume & Make-Up | Alice Eyssartier | Key Costumer |
| Costume & Make-Up | Selma Kalt | Seamstress |
| Production | Laurent Ammar | Location Assistant |
| Production | Axel Calero | Location Assistant |
| Production | Fanny Crouvisier | Location Manager |
| Production | Pierre-Antoine Louis | Location Manager |
| Crew | Ludivine Doazan | Script |