A love story between Pyong Gang and On Dal.
Pyong Gang (Kim So-Hyun) is princess of Goguryeo. She was raised as a soldier for Goguryeo as soon as she was born. She is ambitious enough to dream of becoming the King of Goguryeo. She meets a man named On Dal (Ji Soo).
|Kim So-Hyun||Kim So-Hyun||Ji Soo||Lee Ji-Hoon||Choi Yu-Hwa|
|Pyong Gang||Yeom Ga-Jin||On Dal||Go Gun||Hae Mo-Yong|
|Kim Pub-Lae||Cha Kwang-Soo||Kim Jung-Young||Kim So-Hyun||Son Woo-Hyuk|
|King Pyeongwon||Jin Pil||Gong Son||Queen Yeon||chief eunuch|
|Ahn Shin-Woo||Wang Bit-Na||Ki Eun-Se||Heo Jung-Eun||Park Min-Sang|
|Kim Pyung-Ji||Jin Bi||Hyun Bi||Pyong Gang (young)||Go Gun (young)|