For two decades during the 80's-90's, the international mail system fostered a network of underground artists, exchanging cassette tapes of music and homemade artwork - all under the radar of main stream media. Taking the DIY message of Punk as a jumping off point, our travel through the network departs from the bleak 1980's Thatcher-era UK, community radio and fanzines and all points in a journey to a thriving self sustaining culture.   We track down some key figures in the cassette scene, and follow the web of connections outward from the UK around the world, mapping the impacts and their ongoing effects. We speak with musicians, label runners, and fanzine writers, who share their experiences of connecting through the mail system and its ongoing effects on their lives.