Between September 1940 and August 1944, luxury hotels are requisitioned by the Germans as staff headquarters, giving the hotels' employees a ringside seat of the enemy's secrets and activities. Such is the case with Royal Palace, run by Maxime and Solange Verdier, in which the Abwerth, the German counter-intelligence service, establishes its HQ.
| Directing | Claude-Michel Rome | Director |
| Writing | Claude-Michel Rome | Screenplay |
| Writing | Stéphane Freiss | Screenplay |
| Editing | Stéphanie Mahet | Editor |
| Camera | Bernard Déchet | Director of Photography |
| Production | Eric Dussart | Associate Producer |
| Production | Olivier Glaas | Producer |
| Sound | Frédéric Porte | Original Music Composer |
| Production | Sylvie Brocheré | Casting |
| Art | Dominique Treibert | Production Design |
| Costume & Make-Up | Cécile Dulac | Costume Design |
| Costume & Make-Up | Chouchane Tcherpachian | Costume Design |
| Costume & Make-Up | Carmen Arbues-Miro | Hairstylist |
| Costume & Make-Up | Agnès Bayard-Massot | Makeup Artist |
| Costume & Make-Up | Thierry Di Cecca | Key Hair Stylist |
| Costume & Make-Up | Delphine Duguet | Makeup Artist |
| Costume & Make-Up | Valérie Feuilloy | Hairstylist |
| Costume & Make-Up | Françoise Fregonese | Hairstylist |
| Costume & Make-Up | Corinne Masselo | Hairstylist |
| Costume & Make-Up | Sophie Pré | Makeup Artist |
| Costume & Make-Up | Dany Vasseur | Key Makeup Artist |
| Costume & Make-Up | Christine Vizier | Hairstylist |
| Sound | Stéphane Bucher | Sound Mixer |
| Sound | Laure Justice | Dialogue Editor |
| Sound | Philippe Penot | Foley Artist |
| Sound | Williams Schmit | Sound Re-Recording Mixer |