Eleven-year-old Eva is upset by the many rows between her parents and decides to run away. She wants to hide at her best friends Jackie and Thomas’ house, but circumstances bring her to her mysterious neighbour’s garden. She finds a secret letter there, which tells her the man is a king pin in a criminal organisation. And he is not exactly happy with Eva’s unannounced visit. To convince her of the importance of secrecy, he reveals that Eva’s dad is also involved in his illegal affairs. Eva hesitates: is her father who he claims to be? From that moment on, the enterprising girl does her utmost to exonerate her father from being involved. A period dawns in which Eva discovers that grownups also lead their own lives. She wants to ask questions, but at the same time she is afraid of the answers.
Unfortunately the movie The Secret Letter is not yet available on HBO Max.
| Directing | Simone van Dusseldorp | Director |
| Editing | Michiel Reichwein | Editor |
| Writing | Marco van Geffen | Scenario Writer |
| Production | Janusz Gosschalk | Casting |
| Sound | Melcher Meirmans | Music |
| Sound | Merlijn Snitker | Music |
| Crew | Victor Horstink | Sound Recordist |
| Writing | Anna van der Heide | Scenario Writer |
| Production | Elske Falkena | Casting |
| Production | Job Castelijn | Casting |
| Costume & Make-Up | Françoise Mol | Key Hair Stylist |
| Costume & Make-Up | Maartje Wevers | Costume Design |
| Production | Brechtje Schaling | Line Producer |
| Costume & Make-Up | Monica Petit | Costume Design |
| Production | Eva Eisenloeffel | Producer |
| Camera | Lennert Hillege | Director of Photography |
| Writing | Jan Terlouw | Novel |
| Art | Elsje de Bruijn | Production Design |
| Writing | Anna van der Heide | Creative Producer |
| Production | Leontine Petit | Producer |
| Production | Joost de Vries | Producer |
| Costume & Make-Up | Françoise Mol | Makeup Department Head |
| Sound | Chrisnanne Wiegel | Music |
| Sound | Herman Pieëte | Sound Designer |
| Production | Anna van der Staak | Co-Producer |
| Writing | Ernie Tee | Script Editor |
| Crew | Fleur Ankone | Property Master |
| Crew | Kees de Groot | Sound Recordist |
