This is a strange one. I dont know how to describe it (and im not good at it). This show somehow feels like the plot is all over the place and you are not pretty sure where it is going but in the end it all kind of makes sense and it deliver satisfiyng ending. Personaly i would prefer if the show had more episodes and we would explored more ghosts stories and their resolutions because all of those subplots with ghosts where pretty strong and emotional and just really really good.
What it lacks a little bit are core rules when you make detective narrative. They violited some of the basic stuff like main antagonist motives which is not explored very deeply (i like it when antagonist is not evil just because he is antagonist)
Overall it was actually pleasure to watch and last few episode were not draggy at all which is VERY RARE in korean dramas.
Also FL is really pretty and cute i loved her!