It's unfortunate that a drama which seems to have lots of potential became wasted like this. Watched the drama because of Chae Soo Bin and was not disappointed with her as usual. However, the story and progression of the drama was disappointing to me.

Positives:
Acting was great, and the airport theme gives us a glimpse into the difficulties and challenges that occurs everyday.

Negatives:
Some of the character's actions or behavior will frustrate the hell out of you. Many unnecessary subplots and scenes for things that were not further explored or explained. Overemphasis on MC's secret.

Seems like the drama wanted to tackle many issues, but ended up doing none. It's a decent drama if you have nothing better to watch, but doesn't leave you with a memorable or lasting impression.