It was intense and kept me excited to watch until the end, until I was at the end, and wait.. that's it? Such a huge disappointment. There'd better be a 2nd season to complete this unfinished story.
This drama started as a mystery, and at the end, it becomes unsolved mystery..... it's soooooo annoying...I felt like I just wasted my time for a crappy story line ending. The author could have written a much better ending, unless there's a 2nd season. But since it's been 2 years, I'm not betting on it.