This drama was horribly ruined by the writers. I mean literally it actually stopped making sense. (So many scenes I want to use as an example but spoilers are not allowed) Edit: Cause first review needed an adequate explanation. This drama tells the tale of Baek Dong Soo. A typical boy who fights adversity to become one of the best fighters with the help of the sword saint. That's the plot amidst the back story of the Sword Saint and Choi Min Soo's character whose name bypasses me now though I only liked these two in the whole drama. The drama sucked a lot yet I finished it. It began well and with very good acting. It starts of with the child actors who set up the story before the grown up cast takes over. Their acting however paled in comparison to the child actors. I have never in my life ranted about the female love interest like this. She is so absolutely terrible, not one person I know liked her. She was incredibly stiff, that I am amazed, they allowed her to act. The veteran cast was phenomenal but the rest paled in comparison. In terms of script, the writers just took this terribly downhill, that there were scenes that just didn't make sense. Woon is supposed to be the assassin but he never kills anyone! Yet, he spends most of the drama being Mopey Macmoperson about his evil nature. It's ridiculous. The nature of Jin Joo's birth takes quite a portion of this drama but leads to the most laughable and unbelievable plot twist that triggers the deterioration of this drama. It did not need the twenty eight episodes. A stupid and ill planned revolution is added. A Japanese rival is included for no reason and the drama ends on a sad note as many fuss about the only engaging (who am I kidding, the kid was cute okay, he was cute, his character wasn't engaging, he was cute). The drama heavily deteriorates after episode 15. It's like it turned into something completely different. The beginning is engaging, fun and had a lot of us tuning in week after week, but after episode 15, it was rant after rant after rant. I've never seen a drama get so progressively worse that it transcends to just being comedic. It became a perve over Woon, laugh at the lead females atrocious acting and script, then call it a day.