as a foreigner who didn't really know Korean history and political condition, I should say this is a well-made political-history brief of South Korea. with such good visualization and neat CGI, my country should envy.
with many characters and some subplots, it may puzzling at first. but just like revealed truth of history, everything will make sense in the end.
it is generally recommended. but if you are looking for dramatic docudrama with single main plot or protagonist, you'll not really enjoy it. it's more like political-conspiracy thingies film with a lotta historical characters to memorize.