In this Romeo and Juliet story set during Korea’s historical Goguryeo Dynasty, King Yeongnyu (Kim Yeong Cheol) is assassinated by the powerful military general, Yeon Gaesomun (Choi Min Soo). Princess Moo Young (Kim Ok Bin) loses everything when she loses her father, and years later, she plots revenge against the military dictator by becoming a spy who infiltrates the general’s camp. But what happens when the princess falls in love with Yeon Choong (Uhm Tae Woong), the illegitimate son of General Gaesomun. Will Princess Moo Young chose revenge over love? “The Blade and Petal,” also known as “Sword and Flower” and “Knife and Flower,” is a 2013 South Korean historical drama series directed by Kim Yong Soo.