The Advent season is the best time of the year. At least that's what Lotte thinks, and she is already very excited. However, there is still a lot to do before Christmas, but luckily she has Heimlich. The little house elf makes sure that the Advent calendar for Lotte, Lucy, and Pepe is hung up on December 1st, helps with baking cookies, and has incredibly good craft ideas for the most wonderful gifts. And when Grandma Marthe gets into trouble, he teams up with Lotte and Wuchtel to come up with a fantastic plan so that Grandma doesn't end up losing her house.