The planned marriage between Premierpiet and Probleempiet is in jeopardy, scholars Hans and Frans Steenstra have been kidnapped, and a rare ruby has been stolen from the Rijksmuseum. The dangerous Dr. Brein is behind all of this. Sinterklaas must intervene and even sends his Pieten on a trip to Switzerland to prevent Dr. Brein's criminal organization from gaining power.
Museum Directeur
Donnie Bianco
Boris
Sluwe Ruudje
Hans Steenstra
Tante Til
Pittige Pia
Patserpiet 1
Bisschop van Zwitserland
Principe Piet
Probleempiet
Marja, Assistent museumdirecteur
Joris
Verkoper
Padvinderpiet
Dr. Brein
Ambtenaar Burgerlijke Stand
Agent de Bok