The twist in this drama continued until the very end; every episode was interesting. Just have patience during the first two episodes, where you would feel like it's slow or they have kept the main story in the background; the rest of the episodes would be just filler-type ghost cases solving, whereas this is not the case at all. After the first two episodes, there will be lots of twists and turns in the story, and it becomes more interesting and engaging after that. This drama can be watched not only by those who like horror stuff but also by those who like the crime and investigation genres.