I almost never give 10/10s, but I can say this show wholeheartedly deserved it. Shin Hye-Sun as Ban Ji-Eum carried this show; that is not to say that the other actors weren't good (they undoubtedly were), but her character/acting was so good. I loved watching her hint that she was Ju-Won in the past life, as opposed to directly telling Seo-Ha. She did that part so well by being so sly and intelligent, yet also confident. That was so much fun to watch, and the main lead romance plot was one of the best I have seen in a kdrama. It got me so engaged, and the way the plot went, it was so entertaining to watch play out. Nearly every episode had at least one scene that was so brilliantly done, and the entertainment of watching Ji-Eum play Seo-Ha in addition to the unfolding story of the two mysterious characters made it so I could not wait for the new episodes to be released on the weekends. The romance was superbly done, and the historical mystery aspect of this kdrama really took this show to the next level. I cannot express how much I loved this show, and this will forever be one of the first shows I recommend to people if they are looking for a good kdrama, regardless of whether they are a seasoned koreaboo or a new fan wanting to get into it.