An opera ballet that doesn't exist. A ghost-like piece, played in Opera Bastille and danced at Opera Garnier. An almost mystical link between both scenes. A musician is testing sounds in Bastille's pit. The choir are taking their place in the rehearsal studio. Both sides are fine tuning the work in progress of an opera ballet: Sarah Winchester, her grief, her madness, her home and her ghosts.
| Directing | Bertrand Bonello | Director |
| Writing | Bertrand Bonello | Writer |
| Editing | Fabrice Rouaud | Editor |
| Production | Bertrand Bonello | Producer |
| Production | Judith Lou Lévy | Executive Producer |
| Directing | Ilan Cohen | First Assistant Director |
| Lighting | Laurent Bourgeat | Gaffer |
| Camera | Pierre-Hubert Martin | First Assistant Camera |
| Lighting | Axel Pardessus | Electrician |
| Lighting | Nicolas Rapin | Best Boy Electrician |
| Camera | Irina Lubtchansky | Director of Photography |
| Sound | Bertrand Bonello | Original Music Composer |