Not that I cared about the plot, but the plot: Written by Eric Pearson, Craig Kyle and Christopher Yost, «Thor: Ragnarok» begins with Thor breaking free from the clutches of fire demon Surtur. (chicagotribune.com)
It's like a joke about visual effects: «Look, we've got this snazzy software — if you want hordes of fire demons, we can pile on a few hundred more, no problem.» (filmcomment.com)
After being imprisoned by fire demon Surtur and then escaping, Thor (Chris Hemsworth) returns to Asgard to find mischievous half - brother Loki (Tom Hiddleston) in command of the kingdom. (kibsreviews.blogspot.ru)