Not sure whether this was made to shock more than thrill and have us biting our nails. That's how it turned out for me and the shock wasn't, sadly, in a compelling storyline, but the fact it is very different from the vast majority of K-dramas, with sex, nudity, swearing and sex talk.
Sadly the sex scenes felt too unnatural and gratuitous in several instances.
I found the plot very disjointed and one particular, very vulnerable, character's actions had me losing all sympathy for her situation and totally lost credibility. Utterly stupid decision making.
The Shamen was.... ??? Really, like, what was her purpose.
The police were a waste of space and screen time; inept and utterly useless.
The actions of supporting characters with the aforementioned vulnerable character in some latter episodes, were frankly unbelievable and totally ruined those scenes for me.
By the end, I was not at all surprised at how weirdly it was left.
The cast were very good (only reason this gets a 6 overall from me), but the story could have been so much more.
I would not watch this again.