Tennis was historically a sport of the upper classes and a fixture of lily-white country club culture, and the Williamses were the ultimate outliers. They burst onto the scene with phenomenal fanfare, anticipation, and some skepticism -- but Venus and Serena had the grit and raw talent to back up the hype. Fierce competitors on the court, the siblings remained consummate professionals despite enduring criticism and ugly rumors that reeked of racism. Through exclusive interviews with Richard Williams and rare home movies featuring the Williams sisters' amazing trajectory, this documentary is an illuminating portrait of a family that forged a path for future competitors of color while revolutionizing the sport of tennis.