Moon Lovers: Scarlet Heart Ryeo

While trying to save a child from drowning in a lake, Go Ha Jin (IU) finds herself swept away. When she wakes up, she's in the Goryeo dynasty, in the body of a 16-year-old girl named Hae Soo. It seems she has time-traveled to the past.

In this ancient kingdom, she meets several handsome young princes, some of whom develop feelings for Hae Soo. Among them is the kind 8th prince, Wang Wook (Kang Ha Neul). However, there is also the cold and mysterious 4th prince, Wang So (Lee Joon Ki).

Despite initial awkwardness, Hae Soo's warmth gradually endears her to prince Wang So, who becomes smitten and wishes to marry her. Which prince will Hae Soo choose to marry? And can Hae Soo, who is actually Go Ha Jin from another time, find her way back to her own era?

This drama, Moon Lovers: Scarlet Heart Ryeo, isn't just about a princess and her princes. It's also filled with exciting battles for the throne, including thrilling fights and clever political moves in the kingdom.