Documentary telling the story of Stax, one of the most influential soul record labels ever. Founded in a black neighbourhood of Memphis by a white brother and sister in the 1960s as a studio with an open-door policy, the label went on to sign such iconic acts as Otis Redding, Isaac Hayes and their house band, Booker T and the MGs. Featuring interviews with Jesse Jackson, Elvis Costello, Chuck D, Justin Timberlake, Bono and Pete Townshend.