Sinterklaas and the Pieten have a big problem. The castle of Sinterklaas is about to collapse. It must be demolished. That is why Sinterklaas and the Pieten are forced to stay at a campsite. Even Hugo Hogepief is at a loss, because no castle means no presents and gingerbread cookies for the children. Even though Kim Kado, Marco Marsepein and Willem Wortel try their utmost, there is a huge chance that the Sinterklaas party will not happen. But is the castle of Sinterklaas really about to collapse or is it a cunning plan by Stan & Olivier? Kikkie and Paco don't trust everything and start an investigation. Will they manage to save the Sinterklaas party?

Sinterklaas is back in the country, so it's high time for the annual "Great Gingerbread Baking Competition." Bakers from all over the country are vying for the title: Master Baker of the Year. Marco Marsepein is also determined to win, as he succeeds every year. His dearest grandmother's secret recipe has never let him down. But... this year, Bartus Bakker and his father are also vying for that coveted first place. The evil baking duo cunningly steals Marco's secret recipe and ruins his gingerbread dough. When Bartus Bakker wins the baking competition, Marco is utterly devastated. He decides to leave Sinterklaas's castle and return to his native Italy once and for all. But what would a great Sinterklaas celebration be without Marco Marsepein and his gingerbread?

Mies is turning twelve and everyone is welcome. She has plenty of cake, the coolest playlist ever, and all her chicks are coming. Or so she thinks... But actually, the party is at a boring campsite, her dad has invited two extremely stupid old folks, her chicks aren't coming at all, and there isn't quite enough cake after all. When the campsite's hottie agrees to come as well, Mies takes matters into her own hands.