Jeon Nok Du lives on an island with his father and older brother. He is smart and a good swordsman. Since he was little, his father did not let him study or go to the mainland. One day, his father and older brother are attacked by a group of female assassins. Jeon Nok Du chases after one of the assassins to the capital. During that time, Jeon Nok Du meets Dong Dong Ju. She wants to shoot the King with her arrow, but Jeon Nok Du saves her from trouble. Meanwhile, the assassin that Jeon Nok Du chases goes into a widowed village. To find out who and why his family was attacked, Jeon Nok Du disguises himself as a woman and enters the widow village. There, he meets Dong Dong Ju again. She is an apprentice to become a gisaeng.