In the early 1980s, a small group of dedicated Bay Area headbangers shunned the hard rock of MTV and Hollywood hairspray bands in favor of a more dangerous brand of metal that became known as thrash! From the tape trading network to the clubs to the record stores and fanzines, director Adam Dubin reveals how the scene nurtured the music and the music spawned a movement. It is told through powerful first-person testimony and stunning animation and photography.