Choi Kang Chi is a half-beast and half-human and was adopted by a merchant Park Mu Sol when he was a infant. Kang Chi has a kind of unusual power. Dam Yeo Wool is the daughter of Dam Pyeong Joon who is the owner of the Invisible Knife Moo Kwan and also a patriotic warrior. Kang Chi and Yeo Wool meet and fall in love with each other. However, there is hatred between their fathers. Jo Gwan Woong is a traitor. He uses his power to frame faithful and upright individuals and obtain profit for himself...