A very interesting story poorly executed, especially during the final episodes. Ji Sung does an excellent job in playing multiple personalities. Jueng Um is excellent when serious but frantically irritating at other times (which made sense in She was Pretty- but not here as a psychiatrist). The repetitive nature of the filming (seriously, we started counted how many times they repeated one scene- I won't spoil but it was almost 20- anybody who saw the series will know exactly what I am talking about) and soundtrack became irritating and some plot lines were unnecessary and distracted from the main story. Because of the story, we did finish. Because of the screenwriting and filming we finished frustrated.