for some reason IU likes to do a kdrama that leaves each viewers a question and wonder what ifs at the end of each story. The story is about lies that made one person so bitter, deceit that hurts through ones soul,revenge that all you can see is darkness,forgiveness that repairs your hope and atonement for the sins committed because that finally closes that chapter of ones life.
All of them in the story are victims of ones self centeredness and that despair can make you do unimaginable things and regret it for a long time.