This drama made me regret picking it up... The first 5 episodes was ok, it had a unique start that differentiated itself from Americanized vampire shows like Vampire Diary and Twilight. I was looking forward to a good story but somehow the director killed it by dragging things out for 10 episodes (ep 9-19 basically) where nothing was happening. The bad guys in this drama is cliché enough to give me cancer; the boss man is all talk and no action, his minions are 2 dimensional with no personality and easily killed off by himself or Ji Sang, their goal is some nonsense that is never revealed in the drama. The good guys are not any better; in fact they are worse. I can't count the number of times i face-palmed at Ji Sang running into a 5 vs 1 and getting beaten up then repeat. Does he have some psychic powers to know the bad guys won't be carrying a gun and therefore he is in no danger of being unloaded with bullets? There is no 'cool' factor or 'wow' factor in walking into a beating over and over again, therefore i have no clue why the scriptwriter keeps pushing Ji Sang into a mob of bad guys with no plan whatsoever. The romance in this drama is one of the few times romance just seems completely out of place. To say there is no chemistry is an understatement. Between looking for a cure and discovering who murdered his parents, Ji Sang literally has no time or effort to fall in love. That's why the chemistry between the main leads is so awful. Normally I am a pro Nona/Donsang relationship person but in the case of Ah Jae Hyun and Goo Hye Sun I believe the pairing failed spectacularly XD The soundtrack employed in this drama is mediocre at best. The problem is that there is only ever one soundtrack for action scenes and every single time something is about to happen the soundtrack plays and gives away the scene. Nothing really stands out in the music score that really caught my attention except maybe the ending theme I liked the piano. Overall my gripe about this drama is its failure to live up to potential. This drama would have been much better without the stereotype bad guys and romance to mess up the pace and create needless conflict.