Baekhyun was diagnosed with malignant brain cancer at the age of sixteen. He was told that he only had a limited amount of time to live. As he gets weaker from attempted chemotherapy, he starts seeing a girl with a yellow ribbon tied in her hair in his dreams but he never sees her face, she remains a mystery. Everywhere he goes, he sees a flash of this yellow ribbon. He chases it but it always disappears before he can see her. He makes it his life goal to find the girl with the yellow ribbon before he is gone.