In January 1972, Archie Shepp recorded the album Attica Blues as an homage to the Attica prison rebellion, 40 years later he revisits this music. We follow him along with 25 musicians through days of intense rehearsal to the opening concert in Paris. The Sound Before the Fury interweaves this narrative with images from the rebellion, and interviews of the leaders recorded in 1972. We witness Shepp's determination to transmit, beyond the notes, the meaning and feeling of his music ; we discover the ties, some intimate, that the musicians have with the Attica events.