A young musicologist who was called to examine the documents (actor: Ivan Capua) travels to the town of São João del Rei, in the Brazilian province of Minas Gerais, where the orchestra is based.
They describe their journey and tell of their collaboration with a Brazilian composer named Antônio Francisco da Cunha (actor: Luiz António Rodrigues), a mulatto from São João del Rei.
Due to his musical talent, as a boy (actor: Elder G. da Silva Santos), Antônio had been able to take advantage of a law of Minas Gerais, which permitted him to obtain the "carta do alforia", a letter that guaranteed him freedom from slavery.
Admitted as a member of a brotherhood of former slaves, the young Antônio Francisco da Cunha had the opportunity to perfect his talent and become one of the most important composers of Baroque music in the State of Minas Gerais.
Documents also reveal that the composer cultivated a close friendship with the poet Claudio Manuel Rezende, a supporter of the underground independence movement "Inconfidencia Mineira", which also fought for the abolition of slavery.