I'm fascinated in Kang Dong Won performance in every movie I came across to see. Although not all his movies have outstanding plot unfortunately. This movie shows that time spent with person who we loved is most precious and even because of time passing by and those memories will eventually fade away that person will haunt us in our dreams. How can we tell the difference between reality and the dream when the dream is a place with our beloved person. I think this movie tells us that... M is a film which some people will love and some will hate. It's really complex to describe. I must admit that on the visual site this move is just great, all the twist in the plot and all strange conversation gave me goosebumps. I was so curious how this story would end. I was pleased with the ending, it was good, it explained all the crazy stuff that were going on in the movie. Actually it was a little sad and beautiful in the same time. Music was good, but not so memorable to recommend, although all the background sounds that were in the movie, were perfect fit for the story and it gave it soul. If you like Kang Dong Won as I do, this movie is a must see, but if you don't it will bored you and annoy you. Re-watch value in this kind of movie I think none.