Acclaimed actress/comedienne Whoopi Goldberg directs and appears in this feature documentary about Jackie "Moms" Mabley, an African-American stand-up comic and show-biz pioneer who emerged from the Chitlin' Circuit of African-American Vaudeville to become a mainstream star on the stage and TV. Mabley pushed the boundaries of comedy by tackling topics such as gender, sex and racism, making her one of the first taboo-pushing comedians on the comedy circuit. Once billed as "The Funniest Woman in the World," Mabley performed up until her death in 1975. The film includes vintage clips and recordings of Mabley through the years, as well as recent interviews with some of the world's top comedians, including Eddie Murphy, Joan Rivers, Kathy Griffin, Robert Klein, Bill Cosby and Goldberg - each of whom is a huge Mabley fan. A true passion project for first-time director Goldberg, the documentary shows Mabley's historical significance and profound influence as a performer vastly ahead of her time.