Anubis en de Wraak van Arghus plot
Because it's Appie's birthday, the Anubis residents go to an old mansion. During Appie's horror party, the clock strikes twelve and the house begins to haunt; the piano plays by itself and behind a closed door is a real haunted house. But if one of them is missing after that, it doesn't seem like fun anymore. Do they scare each other? Or is the house really haunted? Nienke thinks it has to do with the diary she found in the house. It belongs to the lonely little boy Arghus who lived in the house a hundred years ago. He wanted to belong to a group of friends, but was rejected by them, after which he swore revenge on their friendship. In and around the house it starts to haunt more and more and no place is safe. The Old Willow Club investigates and discovers that they are the victims of a dark ritual. But then Nienke also loses the rest of the Club. Will she be able to save the others on her own? Or will they forever perish under Arghus' vengeance?