Ok, so first I watched a lot of ghost, spirit, horrors movies/tv shows. The story is original and it tied the 3 main characters pretty well.
First episode set the drama in a gore/horror atmosphere that won’t last. Other episodes until 9, were pretty slow to me and repetitive.

When I watch a movie/tv show, I’m pretty picky about the characters. The story can be simple, not elaborated, revisited, it won’t bother me as long as characters have some depth. In this drama, the characters communicate 80% of the time by yelling. I find that emotions aren’t right ..... Hwa-Pyung and the inspector are just 2 angry people acting recklessly and doing whatever they want, when they actually don’t have any power to stop possession or to stop Park Il Do! The only one who actually shows diverse emotions is the priest, Choi Yoon. And during all this screaming .... it seems they are all alone in public places as no one reacts or does wayyy too late. There are also some inconsistencies in the story that made me sigh a little. Episode 1, Hwa-Pyung can see ghosts before being possessed, yet every single time he explained his link with Park Il Do, he says he’s like this since he was possessed.

I’m at episode 10, skipped some episodes as some are very slow and yet I still can follow the storyline.
There is more mystery around the priest and evolution in his character, this is why you’ll keep watching it. I hope it will get better and better as I had high expectations for this drama, and so far it didn’t meet them