To my great consternation, I know nothing about Korean history, and have only seen a couple of Korean movies. The language is similar in structure (and to me sounds tantalisingly close) to Japanese, but I haven’t yet turned my eye on this particular culture.
Shadowless Sword is the Korean version of a wuxia historical epic, with clashing dynasties, vicious assassins, loyal bodyguards, and lots of fighting. There are some fantastic scenes amongst the impressive fight choreography: wuxia-style floating leaps upon lakes, underwater combat, stone-breaking arrows, and special techniques that cause people to explode. It has a sad ending, but it’s a great movie.