K3 visits an animal hotel

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?

Karen, Kristel and Josje of K3 are overjoyed that their three nieces come to spend the weekend at their apartments. The joy quickly turns sour because the three girls appear to be spoiled brats. This attracts the attention of chief Angel Manuel. In the Cloud Kingdom, where the angels live, Manuel is the director of the Department of rascals. The children who are little rascal, should stay honest for 24 hour and strictly follow the rules of the Angels Book. Because if they do not, is a very special punishment. Manuel orders his assistant Ture to change the three nieces' character, but he instead takes K3, by mistake. Now they need to behave for 24 hours, a task which reveals itself very difficult.