When two troll siblings wake up all alone in their cave, they need to embark on an adventure to find out were the 100 troll family has gone to. New things come to light about their family and feared mother Grýla.

When his client Stefán accuses him of being a useless life coach, Marteinn sets out to prove otherwise—by dragging him to a party packed with influencer friends. But the evening spirals out of control once glamorous power-duo Helgi and Helga swoop in and steal the spotlight.