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.

K3 visits an animal hotel

Because of a misunderstanding, Plop turns into the new king. Klus, Kwebbel and Lui move to the palace, while Plop is trained to be a king. Plop is worried. What happened with the real heir to the throne?

K3 is special guest on a cruise ship. They have to perform on the ball, and expectations are high. But during the cruise a lot goes wrong. Especially because of all the sabotage from Elvin the Pearl Elf. Of course Hanne, Klaasje and Marthe will be singing many new songs.

Incurable romantic Lotte finds her life upended when her plans for a picture-perfect wedding unravel -- just as her self-absorbed sister gets engaged.