Imprisoned on the other side of the universe without his hammer, Thor has to race against time to return to Asgard to stop Ragnarok - the destruction of his homeworld and the end of Asgardian civilisation. But before he can battle Hela, the ruthless villain who is responsible for the bedlam, Thor finds himself in a deadly gladiatorial contest going up against a former ally and fellow Avenger, the Incredible Hulk.