Hilda returns, eager to escape the bustling city of Trolberg for a refresh. She embarks on a train with Mum, Frida, David and of course her bold sense of adventure. In Tofoten, Hilda is encouraged to lean into the soft living of this sleepy town by her quirky Great Aunt Astrid – walks by the river, delicious baking, local shopping. But this quiet lifestyle is quickly interrupted when Hilda gets a whiff of something mysterious nearby: a Fairy Mound! Her curiosity leads to more than just an adventure and a new creature-y friend… But to an eerie landscape where danger lurks in the shadows.