A brief description was previously revealed by Marvel Studios, but EW now has a proper breakdown of the full Thor: Ragnarok plot, which picks up from the end of Avengers: Age of Ultron . In the film, Thor will arrive in Asgard after hearing about trouble in his home world, and when he arrives he finds Loki’s style of ruling has led to some lapses in the rules and leads to the freeing of prisoner Hela.