I really loved this drama soo much that i finished it in three days. Its so much a thriller. I was fasinated how the past changed and future accordingly. It was very well written. The story line was great. And the actors. Lee je hoon and other. Everything was perfect. The picturization of past and present was awesome. Kim hye soo acting was great. Especially in that scene in which she was kidnapped. And the suspense it created wes great. I just couldnt hold my self.  but i couldnt understand the ending. Can anyone explain this to me?