The Orchestra di Piazza Vittorio formed in Rome in 2002, after musician Mario Tronco noticed how much talent was sitting unused among the city's immigrant communities and started inviting people to play together. The film follows the resulting ensemble, whose members come from Africa, South America, and Asia, as they rehearse and perform pieces that fold instruments like the Japanese koto and the African kora into arrangements alongside more familiar orchestral sound. Musicians talk about what it means to build a working group out of people who arrived in Italy with nothing in common but displacement, at a time when xenophobia toward immigrants was rising in the country. The camera stays close to rehearsals and performances rather than staging interviews away from the music, so the argument about integration is made mostly through what the ensemble actually sounds like when a dozen traditions play the same piece. The film treats the orchestra as a working answer to a political problem rather than a metaphor for one.