In the 1960s, while America was in the throes of race riots, five people from diverse backgrounds came together in Philadelphia to create a new sound: Philly Soul. Its home, Sigma Sound Studio, was a place that drew Chubby Checker, The O'Jays, Stevie Wonder and many more. This film tells its amazing story.

Follows the successful career of Jackson as well as her unique friendship and devotion to Martin Luther King Jr. and her unsung contribution to the Civil Rights Movement.