This has to be the series to watch if you're looking for something interesting, something that will keep you watching until the end and not skip. This has to be one of my favorite dramas; I've seen it several times and it never gets old; the story hooked me from the first scene. All of the characters are interesting, and you'll doubt everything until it all comes together. The main character is superbly written, and Nam Koong Min's performance is flawless. All of the actors did an excellent job portraying the characters; it may have made me cry and suspect many times, but it is the best series for me.