It has a right amount of creepy, revenge, eerie, and suspense. However, this was quite hard to understand as the way the timeline was set all wrong. The audience was never told how much time had passed and sometimes I wondered to myself if the scene was a flashback, a nightmare or reality. I came for Son Ye-jin, and I can assure you that I only stayed because of her. I think the script was written well, but the execution in terms of editing and prioritizing scenes was messed-up. The characters were hard to tell apart at first, but I eventually got used to it. The plot was VERY unpredictable; the build-up dragged a lot but the ending was semi worth it. The build-up also did not do some of the characters justice in terms of the screen time each of them deserved. Overall, do not reccomend.