Scarlet Heart: Ryeo

Go Hajin, who appears to have drowned in the modern day, awakens in the Goryeo era possessing the body of Lady Hae Soo. Meanwhile, the palace princes anxiously await the return of their brother, 4th Prince Wang So.

Hajin's bold actions draw the attention and disapproval of 10th Prince Wang Eun and the enigmatic figure So. As tensions rise, a significant spiritual ritual ceremony is set to take place.

So and the 8th Prince Wang Wook discover a disturbing situation while in the forest, prompting concern. Meanwhile, Hajin attempts to more convincingly take on her new identity.

Lady Hae Myeong reflects on her role as Wook's wife, feeling she has fallen short in her responsibilities. Meanwhile, Hajin starts to gain a deeper understanding of So's character.

Hajin attempts to distance herself from her growing feelings for Wook, while Lady Hae actively works to bring them together. Meanwhile, So navigates his new role in the palace, facing both challenges and resistance from those who are uneasy with his presence.

Hajin learns she is to be married, though she is hesitant about the arrangement. Her fiancé is a powerful man whose influence is hard to resist.

Hajin faces unexpected difficulties adjusting to her new role as a court lady in the palace. Meanwhile, the court prepares for a grand celebration honoring Eun's birthday.

Hajin uncovers the true motive behind Court Lady Oh Sooyeon's strict treatment of her. Meanwhile, preparations begin for a rain ritual intended to end the ongoing drought.

Hajin discovers which prince is destined to become King Gwangjong and contemplates whether she can alter the course of history. A political marriage is arranged within the royal family.

Wook becomes increasingly uneasy as So grows closer to "Soo," and tensions rise within the palace following revelations about the Crown Prince's family.

Hajin is arrested for poisoning So, and Wook takes it upon themselves to clear her name before the situation escalates.

Hajin is downgraded to a water maid, and So is exiled to Later Jin. A year later, preparations begin for an important peace gathering.

Hajin is tasked with a critical mission by the king, and her success depends on discerning whom to trust.

A prince is forced to make a difficult sacrifice to secure the king's favor and the hand of his daughter, while the other princes are surprised by the unexpected return of someone they once knew.

King Jeongjong orders So to pursue Eun, accusing him of treason, while Hajin struggles with uncertainty about whom to trust.

Eun and Park Soondeok attempt to flee the Damiwon, while So resolves to claim the throne of Goryeo, understanding that doing so will require significant personal sacrifices.

Prince Wang Yo's declining health creates an opportunity for So to gain influence, while Princess Hwangbo Yeonhwa and Queen Hwangbo devise a strategy to secure their family's position.

A character is pressured into marrying Yeonhwa, while Queen Yoo becomes ill after learning that 14th Prince Wang Jeong is facing punishment.

Prince Wang Baeka is assigned to lead a military campaign to quell a slave uprising in Hubaekje, while Jeong confides in So about his intention to marry Hajin and remove her from the palace.

Hajin moves out of the palace to stay with Jeong, but her health continues to decline. As her condition becomes more critical, questions remain about whether she will have the chance to reunite with So.