I have a thing or two against impervious plot armors that goes to the extremes and this drama was structured around that. The way these characters shrugged off serious injuries and strong poisons without a hitch was just plain comical circus performance. It made the whole series lose its credibility and left this sour taste lingering in your mouth. The characters transformation and development marred the story with crazy inconsistencies and illogical character arcs for the sake of forced progression. Everything went downhill after episode 4, it relied on these outlandish situations that made it way too hard to remain invested. It strained our ability to suspend disbelief way too often to be forgiven. One of the action soundtracks was straight up just a Eurobeat soundtrack, really odd and unfitting choice. Kinda ruined some action scenes. On the bright side, we had Jang Hyuk and some nice action scenes.