Miles Scott is five years old and newly in remission from leukemia when the Make-A-Wish Foundation asks him what he wants to be for a day. His answer sends San Francisco into overdrive: city officials, police, and thousands of volunteers rebuild the streets around a single wish, turning downtown into Gotham City so Miles can suit up as Batkid and fight crime for an afternoon. The film follows the day itself, chase scenes staged for him, a rescued damsel, a mock bank robbery, and a crowd that swells far beyond anyone's expectations, culminating in a public thank-you from the mayor. Interviews and news footage capture how a private gesture for one sick child turned into a citywide event covered around the world, and the people who organized it talk about why they said yes to something this large for a five-year-old they'd never met. It plays as a small story about illness and childhood that outgrew itself into a case study in collective goodwill.