Thor is trapped on the other side of the universe. The weakened and deprived hammer must find a way to return to Asgard and confront the ruthless and omnipotent Hela and stop Ragnarok - the "twilight of the gods", the destruction of the world and all of the Asgardian civilization. Before that, however, he must stand up to a gladiator duel to death and life with a former ally and member of the Avengers team - an amazing Hulk!