Everything shifts when she meets Hui-won (Heo Won-seo), a bright and optimistic boy who is "free from his illness" a terminal condition he has finally overcome. Unlike Ha-young, who is frozen in the past, Hui-won is obsessed with the future and making up for lost time. He discovers a "lost bucket list" that Ha-young and her childhood friend made years ago and insists on helping her complete it. As they tick off items on the list, Ha-young’s "time" begins to flow again, but they soon realize that for her time to move forward, she must confront the tragic secret of why it stopped in the first place.