The search of several young, white men for blues singers who have been missing for decades coincides with the Civil Rights Movement in Mississippi in the 1960s.
| Actor | Role |
|---|---|
 CommonNarrator | Narrator |
 Gary Clark Jr.Self | Self |
 Buddy GuySelf | Self |
 Lucinda WilliamsSelf | Self |
| GGreg TateSelf | Self |
| RRobert MosesSelf | Self |
| DDave DennisSelf | Self |
| PPeniel E. JosephSelf | Self |
| EEd DensonSelf | Self |
| PPhil SpiroSelf | Self |
| AAmanda PetrusichSelf | Self |
 Dick WatermanSelf | Self |