Spectacular cinematography and insane acting performances, the horror element is effective with a good amount of reasoning behind the plot, though the way it turns out at the end might be a little anticlimactic for some. The third act takes a weird tone shift after all the amazing buildups that were done earlier, more specifically its resolution part was given a superpower treatment instead of supernatural ones. Still, the historical and geopolitical backstory had lots of details which are quite logical, and their quality suspense holds well enough to make this an excellent movie overall.