De Ludwigs plot
Benny has been to many foster homes, but this time he goes to the Ludwigs family. The Ludwigs live in a canal house in Amsterdam. The foster parents Erik and Kate have suddenly mysteriously disappeared. The five foster kids - Benny, Sam, Yara, Anoosha and Daniel - must find out what happened to their foster parents. After many searches in the house and in Amsterdam, they have learned many things about families, enemies and they experience many more adventures.