A Spy in Canaan is the story of Ernest Withers, a photojournalist who extensively covered the civil rights movement from Memphis. His pictures, like the iconic photo of Martin Luther King Jr. riding a recently de-segregated bus, are some of the most famous in history. The story goes much deeper, though, and Withers secretly doubled as an FBI informant while he was shooting iconic pictures that propelled the movement. Marc Perrusquia broke the story of Withers' secret double life following a long investigation. A Spy in Canaan tells of that extraordinary case.