An unlucky twelve-year-old Norwegian boy named Odd leads the Norse gods Loki, Thor, and Odin in an attempt to outwit evil Frost Giants who have taken over Asgard.

Having long wondered what lives beyond the ice shelf, nineteen-year-old mermaid Ersel learns of the life she wants when she rescues and befriends Ragna, a shield-maiden stranded on the merfolk's fortress. But when Ersel's childhood friend and suitor catches them together, he gives Ersel a choice: say goodbye to Ragna or face justice at the hands of the glacier's brutal king. Determined to forge a different fate, Ersel seeks help from the divine Loki....