Born a princess and raised a soldier, Pyeong Gang is a woman with big dreams and limitless ambition. Determined to become the first Empress of Goguryeo, Pyeong Gang will stop at nothing to make her dream come true. Clever and level headed, Pyeong Gang is well aware of the obstacles that stand in her way and she’s more than capable of taking them on. With meticulous planning, she sets out to make her dream come true. But things take an unexpected turn, the day she meets On Dal.

Kim So-hyun, Na In-woo, Lee Ji-hoon, Choi Yu-hwa, Kwon Hwa-woon, Kim Hee-jung, Ryu Ui-hyun, Wang Bit-na, Cho Tae-kwan, Kim Pub-lae, Park Sang-hoon, Yoon Ju-man, Son Woo-hyuk