German director Werner Schroeter invited his favourite opera singers to a 13th century abbey near Paris. There was no pre-planned action. There was no script, no continuity. On the other hand, there were precise constraints that provided the rules of the game: the setting, the Abbey of Royaumont, and the chosen participants. Each singer came accompanied by a person of his or her choice, and worked on an aria chosen by the director.
| Directing | Werner Schroeter | Director |
| Production | Wieland Schulz-Keil | Producer |
| Camera | Elfi Mikesch | Director of Photography |
| Production | Christoph Hahnheiser | Producer |
| Production | Anne Cauvin | Producer |
| Production | Jean-Pierre Bailly | Producer |
| Art | Alberte Bersacq | Production Design |
| Editing | Juliane Lorenz | Editor |