Using the only 1920's era recording device in existence, Jack White and T Bone Burnett produce a series of recording sessions in tribute to the mostly unknown artists celebrated in the three prior episodes of this PBS documentary series.
In 1927 a sanctified preacher unites a southern town and inspires Bebop, coal-miners use music to rebel against their cruel working conditions, and a wild bluesman emancipates the Mississippi Delta.
In the 1920s, the Hopi, Hawaiians, Hispanics, Cajuns, and a once forgotten folk singer are all brought together to make records that let America hear itself for the first time.