When something bad happens at Aunt Til's exposition, the Sinterklaas fest seems to end once and for all. A series of terrible events is set in motion, which treatens to free the evil Dr. Brein and her accomplices.

Tika, the daughter of TiTa Tovenaar, can stop everything around her just by clapping her hands. But she longs to learn so much more and to meet other people. She feels quite lonely in the sky castle where she lives, and her father, TiTaTovenaar, is mostly busy turning strawberries into camels. Luckily, there are the Grobbebollen and the wizard’s apprentice Kwark. Through them, Tika ends up in the Grobbedal and gets caught up in an exciting adventure, where she meets the Grobbedalers as well as the wicked Grobelia and Grobbema…