This drama is totally different from other Kdramas. I'm usually a lover of fantasy dramas but the first episode was a dragged for me but the following episodes made up for it.
What I hate so far of this drama is the way they cut the scenes and music from one scene to another.

Over all I am at this point eager to watch the second part.

SPOILERS next up:

I must say since I saw that Ta Gon is a Igutu as well, I thought he might be one of the heavenly objects or something, forgetting they came down only 20 years (since birth of Eun Som, Tan Ya and remember the child taken by Ta Gon in the beginning) long after he was born already. Those three born at the same time makes them the bell, the sword, and the mirror, which is revealed at the end. I DID NOT see that one coming, Tan Ya being one of them.
If Eum Som and Saya shared 'dreams'of each others life, I'll assume that this will become a battle between Eum Som and Saya for Tan Ya's love and Ta Gon being Saya's 'father'will manipulate Saya to become evil in order to cased Eum Som out of the picture. I really hope I am wrong about this, because then the plot is quite predictable.