I only rarely write reviews. I write reviews on two occasions, when I find a series so good that I want to reward it, or when I find a series very disappointing that I want to point it out. This review is the latter case.

I only watched this series because of Ha Ji Won. And continued to watch it because of Ha Ji Won. Put any other actress in that role and I'd never have watched this series, let alone completed it.
Ha Ji Won did portray a lovely woman and I really liked her in this series. She was the best thing this series has to offer, her acting.

The problem with this series is the story and all the other uninteresting characters. I did not like the other main lead.

It was almost unbearable to finish watching all the episodes. First 3-4 episodes were easy, but after about 5 it started to get really boring. Not much really happened during this series I felt like.
In fact I realized after watching it that I could have watched just the first and last episodes and I would have seen the whole story.

But out of about 80 k-drama series I've watched, this one is at the bottom of the list over series I find good. If I'd have to make a "skip these 5 series" list this series would be included.

Find a different series to watch, don't waste your time.