Ellie is a 16-year-old girl with cancer who is determined to live a normal life despite her illness. She dreams of attending her school prom but struggles with the physical limitations of her disease. Her father Dave is overprotective following the death of Ellie's mother, while her friend Sam and nurse Sandy provide her with emotional support. Other characters include Sam's romantic interest Lucy and Ellie's medical caregiver Sandy. The story explores Ellie's battle with cancer and her desire to experience life to the fullest despite the challenges of her diagnosis.