Deprived of his powerful hammer, Thor is held prisoner on a distant planet at the edge of the universe. To save Asgard, he must fight against time to prevent the ruthless Hela from accomplishing Ragnarök, or the destruction of his world and the end of Asgardian civilization. To do so, he will first have to fight a titanic gladiatorial battle against his former ally in the Avengers: the Incredible Hulk.