The boy Lúcio is in the hospital with his mother (Alda) and sister (Zulma) when he receives an unusual visit from his grandmother Neusa, from the films “Dentro da Caixinha”, dressed as a clown. Doctor Parafina lends a mysterious little box that, when opened, transports Lúcio and his family to the Sertão da Memória, a fantastic place inhabited by characters from children’s songs, such as Mulher Rendeira, Mestre André and Marinheiro Só. However, the presence of the children in the forgotten world of old songs revives hope and awakens, in all the inhabitants, the desire for them to stay inside the box forever.