When the time came for the Coen Brothers to find the music for their Southern period piece comedy, 'O Brother, Where Art Thou?', they asked record producer T Bone Burnett to lend a hand. They wanted original recordings of old-timey, American folk music. What they came up with was a sprawling mix of authentic bluegrass musicians and contemporary alternative country stars. Plans were made for the album to be performed live in Nashville and this film documents that concert, complete with backstage preparations and rehearsals.