Empress Ki

Sungnyang disguises herself as a man and works to free women who were sent to be Yuan concubines. King Wang Ko orders Sungnyang to get close to Wang Yu to lure him into an ambush.

Sungnyang reveals to the Crown Prince that there is a spy among them. Prince Togon is exiled to Koryo.

Sungnyang mistakes the Yuan Prince for a Yuan soldier. For the prince's protection, the Koryo King barricades the prince within the Koryo palace.

The Yaun Prince asks Sungnyang to teach him how to defend himself. El Temur plans a full-on attack on Daechong Island in order to kill the prince.

Sungnyang and Prince Togon continue their way to Kaegyong to find the Koryo King. Meanwhile, El Temur takes Koryo's palace under his command.

Yom falls for Sungnyangs trick and brings in Prince Togon's body into the palace. Prince Togon becomes conflicted about choosing to tell the truth or becoming emperor of Yuan.

The King of Koryo finds out that Sungnyang is a woman and tires to protect her from Tangqishi. Meanwhile, at the capital of Yuan, Tanasiri is taking lessons to be empress.

Sungnyang plots to take revenge on Emperor Togon during his wedding ceremony. The King of Koryo and Yom Byongsu are to duel to see who will be commander.