Paris, 1894. Who is Fanni, who claims to be voluntarily locked up in a women-only mental institution? Searching for her mother among the multitude of so-called 'madwomen', Fanni discovers a community of modern heroines who defy her expectations, along with the unexpected friendship of fellow patients. The sumptuous and renowned 'Party of Fools' of the asylum is in preparation. Politicians, artists, and socialites will flock to it. It’s her last hope of escaping the closing trap.
| Directing | Arnaud des Pallières | Director |
| Writing | Arnaud des Pallières | Writer |
| Writing | Christelle Berthevas | Writer |
| Production | Jonathan Blumental | Producer |
| Production | Philippe Rousselet | Producer |
| Art | Gladys Garot | Art Direction |
| Sound | Olivier Touche | Sound Editor |
| Crew | Céline Richard | Stunts |
| Camera | Marc Didier | Aerial Director of Photography |
| Camera | Paul Sourice | Additional Grip |
| Production | Heloise Haddad | Extras Casting |
| Art | Benjamin Vasseur | Location Scout |
| Editing | Aurélien Motard | Editorial Production Assistant |
| Crew | Audrey Meschi | Stunts |
| Production | Christophe Desenclos | Production Manager |
| Production | Jennifer Limam | Assistant Production Manager |
| Directing | Arthur Dezanneau | Third Assistant Director |
| Directing | Olivier Genet | First Assistant Director |
| Directing | Joséphine Harel | Second Assistant Director |
| Art | Yasmina Chavanne | Property Buyer |
| Art | Nicolas Chick | Set Dresser |
| Art | Nathalie Delvigne | Graphic Designer |
| Art | Chloé Desmas | Assistant Decorator |
| Art | Delphine Houdas | Construction Coordinator |
| Sound | Jean-Pierre Duret | Sound Engineer |
| Sound | Dominique Eyraud | Boom Operator |
| Sound | Jean Mallet | Sound Editor |
| Sound | Mélissa Petitjean | Sound Re-Recording Mixer |
| Sound | Bruno Reiland | Dialogue Editor |
| Sound | Margot Testemale | Sound Editor |
| Crew | Leslie Carles | Stunts |
| Camera | Benjamin Colleye | First Assistant Camera |
| Lighting | Sophie Delorme | Gaffer |
| Camera | Claire Jevanoff | Assistant Camera |
| Camera | Marion Josse | Grip |
| Camera | Charlotte Neri | Assistant Camera |
| Camera | Jaomin Vasseur | Second Assistant Camera |
| Costume & Make-Up | Agathe Bernardon | Hairstylist |
| Costume & Make-Up | Marion Di Domizio | Additional Hairstylist |
| Costume & Make-Up | Margarida Miranda | Makeup Artist |
| Costume & Make-Up | Jean-Christophe Roger | Key Makeup Artist |
| Costume & Make-Up | Michel Vautier | Key Makeup Artist |
| Directing | Lisa Benard | Third Assistant Director |
| Directing | Victoire Nyault | Assistant Director Trainee |
| Directing | Manon Rieutord | Assistant Director Trainee |
