Nienke is studying medicine and working at the hospital when Appie is suddenly brought into the emergency room. She discovers that he has been cursed by a Germanic Order. There is only one way to help him and that is to get The Club of the Old Willow back together. It will be a race against time to save Appie, but even more a battle for the old friendship. Can the lure of adventure bring The Club back together? Can the old residents put aside their own differences and disputes?
Unfortunately the movie House of Anubis and the return of Sibuna is not yet available on HBO Max.
| Writing | Gert Verhulst | Writer |
| Directing | Dennis Bots | Director |
| Crew | Marc Van Acker | Cinematography |
| Visual Effects | Carlo Jongen | Visual Effects |
| Sound | Bart Martens | Sound Mixer |
| Crew | Philippe Marchal | Stunt Coordinator |
| Sound | Olaf Janssens | Theme Song Performance |
| Directing | Nele Vranken | Script Supervisor |
| Directing | Marcus Himbert | Assistant Director |
| Sound | Bastiaan Bracke | Sound |
