Magali plays in a brass band. Guillaume drives a small tourist train. Both spin a perfect love, they share modest dreams and their baby is about to come. But an unexpected news upsets their routine: a man appears and announces that he is Guillaume's estranged father and also reveals that Guillaume is his legitimate heir of a kingdom offshore of France and England. Guillaume and Magali start to dream of a life as monarchs, surrounded by faithful subjects in their castle, enjoying their wealth. But reality is often different to what you can imagine.
| Directing | Pierre-François Martin-Laval | Director |
| Writing | Jean-Paul Bathany | Writer |
| Writing | Frédéric Proust | Writer |
| Writing | Pierre-François Martin-Laval | Writer |
| Production | Antoine de Clermont-Tonnerre | Producer |
| Production | Serge Hayat | Co-Producer |
| Camera | Régis Blondeau | Director of Photography |
| Sound | Emily Loizeau | Music |
| Editing | Philippe Bourgueil | Editor |
| Art | Franck Schwarz | Production Design |
| Art | Gilles Iscan | Art Direction |
| Costume & Make-Up | Anne Schotte | Costume Design |
| Costume & Make-Up | Maud Baron | Key Makeup Artist |
| Costume & Make-Up | Valérie Beaudenuit | Makeup Artist |
| Costume & Make-Up | Dorothée Soual | Wigmaker |
| Production | Valérie Espagne | Casting |
| Sound | Martin Boissau | Sound |
| Sound | Cyril Holtz | Sound Re-Recording Mixer |
| Sound | Philippe Penot | Foley Artist |
| Sound | Bruno Reiland | Dialogue Editor |
| Sound | Raphaël Sohier | Sound Editor |