Song Ji-Hyo's brilliant performance --what do I say!!! She successfully gives you the "creepy" vibes and her cold stares freezes the silver screen, I say. The other supporting casts also performed well although I can't say the same about the child actress. I think there are many other Korean child artists who could have done a better job. The first half an hour was a little bit slow paced but enters Song Ji-Hyo and the plot moves faster forward, and grips your attention in her powerful clutch.
The lead actor also does his part of a frustrated and embittered widower and father, well. Throughout the movie, he gains your sympathy.
They should've shown some bits of how the psychopathic cult group is trailed and exposed. Instead, Kim Mu-yeol is shown , all of a sudden running to the forest as if he already knows where his daughter is taken to. He's done his "investigation" but he surely isn't aware of the whereabouts of the cult group. This was the pitfall of the movie.
All in all, I enjoyed the movie and umm, would watch it again. Two times would do.