[spoiler]A nono from the start!
This was a good example on why is better to have a good script rather than high budget, still can't believe hugh stars such as Lee Je Hoon and Chae Soo Bin starred in what it looks like an amateur and boring drama.
The first episodes were good, they introduce us a plot simple but effective, a guy trying to overcome a tragedie who left him paraplegic, right after he tried to commit suicide meets a man who change his life giving to him robotic prostheses to start a new life, at this point everything was good but failed when the whole romantic part take part of the scene.
Lee Je Hoon and Chae Soo Bin are knowing as actors that always seems to have chemistry with everyone but somehow it doesn't work between them, they way they fall for each other through the episodes was too unreal and fake; all the secondary characters were boring as well but the worst thing they made Lee Soo Yeon such a hateful character, if you hate the main character then you know something isn't right.
The only good thing about this was the soundtrack, so beautiful, but you cannot spend almost 19 hours watching a drama just to enjoy a soundtrack.[/spoiler]

My Score: 7/10

**A frustrating show .. DROPPED IT Half-way through **

At first glance I really felt that this was a professional drama with basis of airport and their staff but it was found to be a mystery filled with coincidence in it. I hung around for the unique storyline but there’s a lot of plot holes , not to mention the airport problems and how security dealt with them were downright unrealistic and even irresponsible and dangerous. It would make me nervous to travel in this airport if that’s reality.

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 and dude panic at every malfunction . The female lead was beyond irritating in this show. She was so dumb and I guess they were going for “cutely awkward”, but they missed the mark. Their chemistry is appalling so there is nothing to look forward to in this show.

I don't understand why In-Woo keeps trying to uncover MC's secret just let the dude live his life ; you don't destroy someones life out of guilt for destroying it already once.