I have the feeling this show is quite underrated or, at the very least, it deserves much more success: it's simply amazing. The whole cast is really, really great and the story is compelling. Twists and cliffhangers are endless!
First show for me with Park Bo Geum, while I already had the chance to appreciate Seo In Guk's performance in Reply 1997. As for Jang Na Ra, she's one of my favourite Korean actresses, here in a quite different role.
They definitively left the door open for another season, but I don't think there's going to be a season 2, unfortunately,