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
