Maddy has an immunity disease and has lived all her 17 years in a controlled environment, shut away from the world. Despite her confinement Maddy’s intelligence and delightful personality have not been affected. Yoon tells Maddy’s story creatively, using a variety of quirky and entertaining styles to show how the boy who has moved in next door causes the girl to take terrible risks with her health as she begins to fall in love with him.