Leonardo, an upper-middle class boy from the south of Rio de Janeiro, befriends Kiko, a boy who lives on the street and who juggles balls at a traffic light. The rich kid decides to lend Kiko his handheld video game – but it is stolen by hill boys. This is just the beginning of a great friendship between the two. They begin a great adventure that takes Leonardo to the favela, where he knows a reality entirely different from his own.