Two tribes live in a mythical land called Arth; the red-blooded humans who can't dream and the blue-blooded humanoids who can dream, and who are also faster and stronger than humans. A war for resources breaks out between the two and the humans end up winning the war through some trickery. Years later, the struggles and greed of power continues...

This drama is unique, it brings you to the bronze age. There's a lot of knowledge on anthropology, evolutionary biology, politics, civilization stages, farming, domestication, religion/mysticism. More than just entertainment, they kept me occupied intellectually. I appreciate them to realize this daring concept into a drama. The story itself is using the common fantasy trope; like a prophecy, a mysterious barrier between two tribes, and it's very plot-driven.

The characters are a lot of fun, especially Tagon, the human leader, he's morally ambiguous and dignified, at the same time he hides a dark secret which is a real high stake. I have to say his younger self gave me chills more than the adult version, he had a very cool charisma; great job Moon Woojin, I always admire you, also in It's Okay to Not be Okay, The Devil Judge, yeah). This is also my only favorite Song Jong Ki drama so far, he's magical in his dual twin roles, together with the irreplaceable Kim Ji Won. There's a lot to enjoy within their relationships and dynamics.

Overall, I think it's a really darn good fantasy. I wanted to know more, the characters surprisingly got stuck with me personally, like I think about them when i'm not watching. The first season is laying a wonderful groundwork for the 2nd season.