The female protagonist, Ellie, is a 16-year-old girl with a terminal illness. She develops feelings for a boy named Sam at her school. Although Ellie wants to go to her prom, her illness and overprotective father restrict her. After arguing with her father about going on a date with Sam, Ellie's condition worsens. Seeing his daughter deteriorating, Ellie's father asks Sam to take Ellie to her prom to make her happy, showing he wants the best for her despite his protectiveness.