The Board of Children of Buenos Aires is a center designed to protect underprivileged children. In 1939, the first symphonic orchestra in the world composed exclusively of blind youth was founded there. For decades, eleven teenagers gave themselves to music in body and soul. Basilio, the last survivor of that orchestra is about to retire. The film shows how the Braille scores are made and read, how the instruments are executed while describing the story that hides each of the Patronato's rooms.