i love jichang wook,his acting,his dramas and mostly his action .I mean who wouldn't.According to the drama ,he is a mercernary who is on the run and then the actual story starts .In my point of view ,the writer wanted to have a dark but with a soft side kinda plot.The drama could have been darker but then it would not be for everyone well to be honest it still is not for everyone but the one who likes the darker plot will watch the darker part and the one who like the romantic plot would watch the romantic part.For me,it was a great drama as drama is meant to be fictional and this kinda fictional plot where hero is one man army and can never be beaten is pleasing to my eyes as i love happy ending for the protagonist in every way.