New York City in the early 1980s, when subway cars became the largest illegal canvas in America. Director Tony Silver and co-producer Henry Chalfant follow the graffiti writers who scaled train yard fences at night to spray whole cars end to end, racing transit police and each other for reputation rather than money. Writers like Skeme argue with his own mother on camera about whether the work is art or vandalism, while Mayor Ed Koch and transit officials make the case for buffing every car clean. The film treats graffiti as one piece of a larger culture rising alongside it, cutting to breakdancing crews and early hip-hop DJs working the same streets and parks. Interviews are shot plain, mostly in bedrooms, train yards, and city hallways, letting the writers explain their own hierarchy of styles, tags, and burners without a narrator translating it for outsiders. The film became the reference point for how graffiti and hip-hop history get told, made while the movement it documents was still being invented in real time.