Gilles Peterson heads down to Bristol for the day to explore the city's musical heritage. His journey takes him all around the city, tracing the lineage from reggae and dub to late 70s post-punk, through the arrival of US hip hop and the development of trip hop in the 90s, onto jungle, drum and bass and the dubstep movement, through to the bass innovations of today.

Featuring interviews with the key players involved in cultivating these underground movements, Gilles investigates how Bristol birthed such generation-defining sounds, which ultimately crossed over into the mainstream, achieving phenomenal commercial and critical success. Having left an indelible mark on the sound of modern pop culture over recent years, Gilles also looks to today's Bristol music scene which continues to innovate, remaining as vibrant as ever. Contributors include Jabulani of Black Roots, author of Original Rockers Richard King, Janine Rainforth of Maximum Joy, Mark Stewart of The Pop Group, DJ Krust, Mo Wax label boss James Lavelle, Portishead's Geoff Barrow, Roni Size and Appleblim.