The story was very unique for me. It was not like other dramas at all. In some scenes based on music and experience as a drama watcher you expect something huge to happen but nothing special happens, and there are scenes that something important happens out of the blue, which by the way, were very lacking in music.
The story was consistent and slow, but fulfilling for me. some characters behaved a little illogical sometimes, however in my opinion it was interesting because it made the show more realistic.
In total the series was very interesting for me and had many unexpected happenings, The story surprises you and is sometimes irrational and some scenes don' have any apparent lesson or guidance to offer and are seemingly redundant, which is very refreshing for me. I believe this is a unique flavor that I only encountered in some Korean movies and for the first time in a drama here.
Finally I believe the story is trying to convey just one important message, and that is:
"Don't doubtlessly believe in something"
And it is very in sync with my personal belief. Unfortunately we see the opposite point of view in most of the people around the world, which is the main cause of many conflicts globally, despite the modern era. My favorite quotation which describes this message perfectly is:
"Before having faith be a servant of doubt"