this movie have some pretty bleak thing to say and metaphorically speaking and about love and relationship ( of all kind ) and and it a workable suspense film and too . part giallo and part procedural and part character study and it also have some surprisingly black humor moment like the murder of one character by weight machine and or the impossibly overstate catastrophe that follow the disposal of a victim in the middle of a highway ( hollywood thriller end with huge car crash . this one have it big explosion in the middle and and end with quiet horror ) . although there be plenty of nasty happening in this movie and and a lot of bloody body part pop up throughout and the really disturbing and frightening thing be the implication of what go on . it pretty easy to guess who the killer be and though there be some good red herring that distract the viewer attention . however and it absolutely impossible to guess the killer motivation and and the real meaning of the whole film and until the last few moment . i be still unsettle from have watch this for the first time . i be certainly go to go back and watch it again and probably several time because i be go to have to live with this movie for a while before i can say i have come to term with it . i especially want to be sure of my interpretation of the girl last line to detective cho . of course and i know it suppose to be ambiguous and but i be probably not go to be able to sleep until i be sure in my own mind .