Five inseparable friends, the Wonderboys, are forced to say goodbye because the Old Hag, the owner of their apartments, is about to sell their homes in exchange for a Maradona figurine. When the figurine is stolen by their idol Tonino Wonderboy, the new Munaciello of Naples, their adventure begins in the city's underground, in search of a mysterious treasure.

A social worker dedicates himself to the recovery of children who have dropped out of school in the streets of Naples thanks to the circus arts. His work, however, is not well received by the families of the neighborhood and the courage of these children, with their stilts and their red noses, will clash with the harsh reality.