Dutch children’s friend Saint Nicholas is at his wit's end. The letters from children are stacking up and the list of gifts just keeps getting longer. How is he supposed to deliver all those gifts to all those sweet little children in one night? When Diego proposes to ask good old Santa for help, they travel to the North Pole, together with Clumsy Pete and children Max and Anna. Everything seems to work out fine, until Famke and Yvette, two escaped convicts, mess things up. Will Saint Nicolas and his Petes be able to save the feast of St. Nicholas?

How the helpers of Sinterklaas are able to do their tricks and get into every house is one of the magical powers of Sinterklaas' Book. But when the book loses it's power, it becomes impossible to to fulfill their duties on December 5. To prevent that from happening, Piet Diego and his Elite team embark on an adventure. Quite a big adventure, because the only place to recover the much needed powers is a magical source in Myra - the birthplace of Sinterklaas!

Sinterklaas wants to be absolutely sure that all the presents will be delivered on time. To make that happen, he has come up with a clever plan: a secret gift storage facility in the Netherlands! Months before the official arrival, he secretly goes to check how things are going. But when he arrives, he gets the shock of his life: there are no presents at all! The Piets have received false instructions, and the arrival ceremony has been mysteriously canceled. Someone is pretending to be Sinterklaas — but who…?

When Sinterklaas and Diego arrive at the harbor in Spain, they discover that the pakjesboot has already departed. This marks the start of a race against the clock to catch up with the boat in time. That’s not easy, because thanks to the meddling of the crooks Joris and Boris, the Piets left for the Netherlands a day early...

When something bad happens at Aunt Til's exposition, the Sinterklaas fest seems to end once and for all. A series of terrible events is set in motion, which treatens to free the evil Dr. Brein and her accomplices.

When Sinterklaas has an accident during the test for his “roof certificate,” he ends up in the hospital. Everyone is terribly worried — everyone except the evil Dr. Brein. She wants to use this opportunity to become Sinterklaas herself and change the holiday forever...