In 1989, a group of teens, eager to push beyond the boundaries of gangsta rap, met weekly at the Good Life health-food store in South Central Los Angeles to break new ground -- both lyrically and musically -- in the world of hip-hop. Ava DuVernay's award-winning documentary follows young innovators such as Abstract Rude, Chali 2na and Cut Chemist before they achieved worldwide recognition for their pioneering style and sound.