 Because of King Mink s disappearance, his granddaughter Prinses Vossestaart is about to assent to the throne of Morpuys. However, there is another pretender to the throne, the purple knight of Gil, who s claim to fame is saving Vossestaart from highwaymen. The Hamelaars discover the truth about this knight from daft puppeteer Zottin Sijs and discover their own Princess Madelein working in a pigsty.