Sinterklaas en de Verdwenen Verjaardagsmijter plot
When Sinterklaas receives a birthday miter from the Piets, he wants to display it in the museum. In this way, all people can view it, even before Sinterklaas is in the country. The three crooks Baroness, Henkie and Freigdenhill get wind of this and come up with a plan to steal the miter. But the plan goes further, because they also kidnap Sinterklaas! They only release him if a large sum of money is paid. The Pieten call in Commissioner Hendriksen of the police to get help to solve this case. Together they come up with a plan to get Sinterklaas and the miter back. But will they succeed? Will the evening take place? Magical powers are hidden in the miter and without the miter the entire Sinterklaas party would be in shambles.