In a small and picturesque village in South Korea, where cherry blossoms bloom in spring, a young girl named Yuna discovers an ancient diary in her late grandmother's attic. As she begins to read it, she feels transported to the time of the Korean War, where her grandmother, a brave teenager, fought not just for survival but also for love amidst the chaos.
As Yuna immerses herself in the pages, she also starts to have visions of her grandmother, as if time and space were blurring. In these visions, she encounters a young soldier named Minho, who finds himself caught between his patriotic duty and his desire to change his fate. Their story of forbidden love blossoms in times of adversity, but the war is always lurking, and difficult decisions threaten to tear them apart.
Meanwhile, in the present, Yuna finds herself in crisis, feeling the pressure of family expectations and a lack of direction in her own life. Inspired by her grandmother's courage, she decides to embark on a journey of her own toward family reconciliation and self-discovery. With each page she turns, Yuna learns more about love, sacrifice, and resilience in a world that often seems to be crumbling.
The story interweaves the past and the present generationally, showing how the wounds of the past can still influence the future as Yuna embarks on a transformative journey toward hope and forgiveness.