The fictitious land of Daeho is dominated by two powerful groups of mages who are learned magicians: Cheonbugwan and Songrim. Cheonbugwan reports directly to the King. Songrim is a self-run organisation openly against the practice of sorcery, especially the soul shifters who are able to move from their bodies to dominate another. Soul shifting involves exchanging bodies, often with an unwilling younger person to prolong one's life and is an evil sorcery. Cheonbugwan claims a similar anti-sorcery stance but secretly rivals Songrim for power.

While running away from the pursuit of the Songrim mages, assassin Naksu finds herself soul shifted into the body of MuDeok and later becomes the maidservant of Jang Uk from a powerful elite family. Jang Uk knows that MuDeok is Naksu and uses this knowledge to blackmail her to help him lift a seal on his energy. The Jang Uk is the son of the Head of Cheonbugwan, who has been missing for 20 years but rumours goes that he is an illegitimate son from his mother's affairs.

King is plagued by the prophecy that a powerful King's Star mage would one day appears and is insecure about his position. There are dark powerful forces supporting the sorcerers and the people practicing it are in high places, who will make use of the King's and Crown Prince's insecurity. Even the Unanimous Assembly of mages is dominated by ambitious sect leaders who are secretly hoping to lay their hands on the Ice Stone which can make the soul shifting happens, while claiming to be righteous and anti-sorcery.

What I like about this drama:

a. This soul shifting story is original. There had been dramas based on soul of a person shifting to another - mostly as individuals unique cases. But this drama takes it to another dimension as a widely practised sorcery involving a cult of powerful men and women whose ambitions are to live forever and dominate the world.

b. The chemistry of the leading female character MuDeok (Jung So Min) with the first, second and third male leads is great.

c. The cast is outstanding and acted their parts well. To mention a few:
- Jung So Min - she was outstanding - whenever she was disgusted with Jang Uk, she would squint her eyes and glare at him which was often interesting to watch,
- Lee Jae Wook as the male lead - filled with a desire to break free from his bondage and to excel and at times temperamental and slackening,
- Hwang Min Hyun as the righteous mournful Seo Yul haunted by guilt,
- Shin Seung Ho as the disturbed Crown Prince knowing often that it is wrong but nevertheless unable to resist a selfish course of action.

d. Along the drama, there are a lot of secrets to be unveiled, identities to be confirmed, suspenseful moments and what would be Naksu's choices - make the story very interesting and attention gripping.

What I dislike about this drama:

a. The ending was open-ended. It takes another 10 episodes in a sequel to wrap this up. If I had watched this drama shortly after it was released, I would be cursing as the ending is so crap. But since the sequel is already released, I just hopped onto the sequel to figure out the ending.

Overall, I highly recommend this drama.