When a travelling amusement park appears in the quiet village of Rustenvrede, Johan and Anton can't wait to visit it. But they quickly realise this is no ordinary carnival. And although they are initially sceptical about the whole thing, they voluntarily participate in a trick at school to advertise the amusement park. But ever since Madame Zelda hypnotised them on stage, Johan, Anton, and Karin have been feeling . . . different. Something weird is happening in their quiet little town.