Hilda is an 11-year-old girl who grew up with her mother in a cabin on the edge of the woods near the walled-in city of Trolberg. Over the course of the series, she and her deerfox Twig, later accompanied by an elf named Alfur, and friends David and Frida, go on a number of adventures interacting with and befriending the mysterious animals, people, and spirits that live in and around the city of Trolberg.
