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.
Thor is imprisoned on the other side of the universe and finds himself in a race against time to get back to Asgard to stop Ragnarok, the destruction of his homeworld and the end of Asgardian civilization, at the hands of an all-powerful new threat, the ruthless Hela.