The only day Bergens are happy is Trollstice: a day when Bergens achieve happiness by eating Trolls. Fortunately, King Peppy managed to save his people and hide them for almost twenty years. However a Bergen discovers the hiding place of the Trolls. Princess Poppy's best friends are then captured. Armed with her zest for life and her boundless energy, she will have to rely on a colorless grumpy Troll to find her friends in the territory of their worst enemies.