In the latest musical family film De Grote Sinterklaas film: Gespuis in the Toy Vault, Hugo Hogepief is given the important task of looking after Sinterklaas' key ring. This ring gives access to the safe in which all the presents for Christmas Eve are stored. But when he accidentally falls, Hugo no longer knows who or where he is.

When Mammie and Stan are freed from jail the two once again set their sights on eliminating the Black Petes and Saint Nicholas.