to me and this review may contain spoiler and but i like watch movie with no idea of what be go to happen and so therefore i think many of the other review here of this movie contain spoiler . i just watch this movie again and and i must reiterate that it have the best end to any movie . ever . ever . ever . the real translation and the beating of the butterfly wing and be oddly not use a the translated title . i suppose they think most american wouldn not know what chaos theory be ( except for those who saw or read jurassic park ) . the movie be base on chaos theory and and how one small event can affect the outcome of seemingly unrelated event and which all lead back to one event . the movie be a whirlwind of wondrous cause and effect and a we follow the chain of chaos a it intertwine between several character ( about 20 . ) . in a way and the end seem inevitable despite this and but if you think about it and it be a perfect end . think to yourself and what else need to be say . it be at the same time a very brave end . too bad we have to go overseas for a gem like this one and but an end like this would never come out of hollywood .