Nick Young (Booboo Stewart) is a high school freshman with autism spectrum disorder who idolizes his perfect older brother Chaz Young (Harry Shum, Jr.). While riding his bike to a friend's house, Chaz is hit by a group of guys driving recklessly and dies. The crash leaves Nick fighting to overcome his grief while feeling misunderstood by his distraught parents (played by BD Wong and Joan Chen), who are left trying to preserve the memory of their "perfect son".