After seemingly drowning in the present day, Ha Jin wakes up in the Goryeo era, assuming the body of Lady Hae Soo. The princes of the palace nervously await the return of their brother, 4th Prince Wang So.

Ha Jin's feisty behavior gets her into trouble with Prince Eun, as well as the mysterious, and dangerous, Prince So. The spiritual ritual ceremony arrives.

So and Wook realize something troubling in the forest. Ha Jin tries to more convincingly assume her new identity.

Lady Hae feels as though she has not fulfilled her duties as a wife to Wook. Ha Jin begins to better understand So.

Ha Jin tries to push aside her feelings for Wook, while Myung Hee tries to push the two closer together. So adjusts to his new life in the palace, though not everyone is delighted by his presence.

Ha Jin is informed that she will be getting married. She is reluctant, but her betrothed is a man whose grasp is difficult to escape.

Ha Jin's new life as a court lady presents more challenges than expected. The palace celebrates Eun's birthday.

Ha Jin discovers the real reason Court Lady Oh is so strict with her. A rain ritual is planned to help end the drought.

Ha Jin realizes which prince will become King Gwangjong and wonders if she can change the future. A royal marriage is determined.

Ha Jin is placed under arrest for poisoning So, and Wook must prove her innocence before it is too late.

Ha Jin is demoted to a water maid while So is sent away to Later Jin. One year later, the peace gathering approaches.

The king sends Ha Jin on an imperative mission, but to succeed, she must learn who she can and cannot trust.

So must make a sacrifice for the sake of the king and his daughter. The princes are stunned to reunite with a familiar face.

King Jeongjong sends So after Eun for "plotting treason," and Ha Jin is again unsure of who she can trust.

Eun and Soon Deok try to escape the Damiwon. So decides that he must become King of Goryeo, which means he must make sacrifices.

Yo's mental and physical health continue to dwindle, and So takes advantage. Yeon Hwa and Queen Hwangbo come up with a new plan for the future of their family.

So is pressured to marry Yeon Hwa. Queen Mother Yoo falls ill upon hearing that Jung is being punished.

Baek Ah is chosen to lead soldiers in pacifying the slaves of Hubaekje. Jung reveals to So his plan to marry Soo and take her away from the palace.

Ha Jin leaves the palace to live with Jung, but her condition worsens. Will she and So reunite before it's too late?