Pretentious 7-year-old Allen Gregory De Longpre (Jonah Hill) doesn't see himself as a child but as an intelligent and worldly young man. He lives in a loft -- with his father, Richard, Richard's partner Jeremy, and his adopted Cambodian sister, Julie -- where his father has home-schooled him. But now, Allen Gregory must leave the nest to attend elementary school and deal with the challenges of relating to kids his own age and teachers who don't understand that he is more than the child he appears to be.