Beutolomäus und die vierte Elfe.

Nobody is really looking forward to Christmas this time, and someone is up to mischief with naughty pranks. Sascha gets to the bottom of the matter and learns that the pranks are the work of Rosalinde, the fourth of the Christmas elf sisters. Fourth elf? Rosalind has fallen out with her sisters and casts a curse that turns all Christmas creatures into children. Now Christmas is in danger!