Good premise, but the writer tried too much to shock and surprise the viewers.

It's hard to review this show, as there is close to no valuable content in it. There are two massive plot twists close to the end that make the majority of the plot redundant or have the plot have no effect on most of the characters. The stakes were non existing. There was quite literally no character development, not only for the mains, but also for all the supporting characters.

Maybe, if the finale was stronger and had a nice conclusion, it could make the show decent, but the last 4 episodes were painfully bad and rushed. They tried to connect all the dots (there weren't really that many dots to begin with if I must be honest) in the last 15 minutes, so when the show ended I just sat there and asked myself: that's it?

Soo Min was an amazingly annoying character who made mistakes and had to be saved right till the end of the show and, with how the plot was written and structured, it was impossible to actually give him the development needed. He was the center part of the plot and the only one who truly was affected by everything that was going on.

The supporting cast was quite nice, but yet again, all the characters were more or less ruined by that one unfortunate plot twist.

The good? Most special effects and possession scenes were nicely done. The visual aspects of the show were truly good and I enjoyed the soundtrack, especially just the instrumental parts.

Overall, I quite honestly would not recommend it to anyone.