In the country of Daeho, Jang Uk (Lee Jae-Wook) comes from the noble Jang family. He holds an unpleasant secret about his birth, which people all around the country talk about. He is troublemaker. Jang Ukk happens to meet Mu-Deok (Jung So-Min). She is an elite warrior, but her soul is trapped in a physically weak body. She becomes Jang Wook’s servant, but she also secretly teaches him how to fight.