Hip-hop DJing gets traced from its origins in the South Bronx in the 1970s to the turntablist scene thriving in San Francisco decades later. Doug Pray's film opens with Grand Wizard Theodore recounting how he stumbled onto scratching, and moves through the DJs who followed him: crate-diggers hunting rare breaks, battle competitors building routines out of beat-juggling, and producers treating two turntables and a mixer as an instrument in its own right. The DJs speak for themselves in interview after interview, tracing a line from block-party break extensions that gave rise to rapping and breakdancing, through the technical invention of scratching, to turntablism as its own recognized musical movement with international competitions. Archival footage of early park jams sits alongside scenes of contemporary battle circuits and studio sessions, letting the technique's evolution play out on record rather than through narration. The film treats its subjects as serious musicians rather than novelty acts, following unknown underdogs and established virtuosos who reshaped how vinyl gets used to make music.