Yona, the beloved princess of Kouka, lives a sheltered life in the royal palace, radiating innocence that captivates all. However, her idyllic world shatters when treason threatens her very existence and forces her to escape with only her childhood friend, Hak, by her side. As Yona navigates the dangers of the wild, she sheds her naivety and vows to reclaim her birthright. With Hak as her protector, she delves into an ancient legend, seeking the power to overthrow those who seek to usurp her rightful throne.