The whole village is preparing to celebrate the joyful entry of Sinterklaas. Tim, a boy who is in a wheelchair due to a traffic accident, would like to meet Sinterklaas in person. Of course, that is gladly arranged. Aan Tim tells Sinterklaas a big secret: how he gets so many toys and sweets.
Unfortunately, the conversation is eavesdropped by Mr. Prul, the local toy manufacturer who is very angry with Sinterklaas for giving away toys for free, which means his factory cannot sell anything at this time of year. Soon, through Mr. Prul's fault, Sinterklaas is left without toys. Pierke will try to unmask Mr. Prul and make sure that Sinterklaas gets his toys back …