The biggest weakness of this series: It's a bit slow, and it takes its time to build the world and the characters. Normally, that's considered a good thing, but I must admit I couldn't get into it for the longest time. I really enjoyed the 1st episode, with young Ta Gon, Asa Hon and their children, the Neanderthal she was in love with, I got invested into the characters and their story just to see them all ... vanish. We got a time skip, and everyone was gone. Ta Gon is still alive, of course, but the actor was replaced by an older one. I felt like someone was throwing me out of a story and into a completely different one. I didn't enjoy Eunseom's and Tanya's friendship/romance, because their characters were too childish and innocent. It was meant to be like this, I know, but it was a bit tiring watching them living in the tribe. So what changed? I don't remember which episode it was, but suddenly I was hooked. I was fascinated by Ta Gon and Taen Al Ha, those characters (and actors) just stole the spotlight. Their performance, their intensity and their political intrigues and mind games were incredible. I also started to admire Tanya, and I saw her growth and potential. Of course, the whole plot about the twin brothers was very intriguing. So I went back and rewatched the first episodes and finally understood that this series is brilliant.