It also inspired a spin-off feature film, Pyrus på Pletten, which premiered on Christmas Eve in 2000.
The elves can magically transport themselves into both fiction and history books to gather first-hand information from the characters within, whereas the humans rely on traditional research using the historical documents housed in the archives.
Each season focuses on a specific theme: the general concept of Christmas, the elf, the figure of Santa Claus, and fairy tales, respectively.
To complete the task, Pyrus discovers he must work with a classmate, Kandis, a sweet and highly intelligent female elf.
Over the course of the 24 episodes, Pyrus and Kandis travel into various books, including works of fiction, fairy tales, fables, children's literature, and other texts, to research their paper.
Bertramsen and Josefine work to convince the government not to demolish the Archives by proving something that cannot be found online: the existence of elves.
One day, Uffe Andersen, unaware of their presence, accidentally locks Kandis inside a closet.
[1] Bertramsen is tasked by the Royal Family with assembling a collection of fairy tales for the newborn prince.
However, by accident, Pyrus magically combines all the fairy tales into one large book of randomly jumbled snippets.
Now, Pyrus, Kandis, Gyldengrød, Bertramsen, and Josefine must find the lost girl and rediscover all the fairy tales to restore them to their proper order in time for Christmas.