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Sonia and Espen continue to explore the magical Jotundal. Sonja still thinks of the forest as a fairy-tale place full of adventure and wonder. But one day it is suddenly overrun by a horde of angry Vikings... Together with Lotte, a girl from the mountain people who has special magic, and the Oracle, they want to kill all the trolls. And that means Espen as well."

This time, Sonja finds herself in the midst of a deadly conflict between Vikings, trolls, and elves. Will she be able to protect her friend from being petrified? What will happen to Jotundal? And why is Lotte looking for an enchanted tree? So many unanswered questions, and even more adventures and discoveries ahead.