Great Concept! but the movie isn't so great
Just like I said in the title.
ITs main concept saved the half of the movie.
Whole story line seems too contrived especially the very last 1 minute.
Too many characters were left out with not enough development or explanation.
I think the main aim of this movie is supposed to makes you feel very disturbing
yet I wasn't quite disturbed..
Direction, editing, acting were all watchable but wasn't quite impressive.
Still I am giving it 6/10 as I see this as a valuable try to extend boundaries of
Korean movie industry.