A spare upbringing in Edinburgh's public housing informed his 1993 breakout debut novel "Trainspotting," and onetime punk musician Irvine Welsh was launched on a career in letters further marked by "The Acid House," "Filth," "Skagboys," and "The Blade Artist." Here, Welsh reflects on his challenging times and it's impact upon his literary craft, supplemented by observations from Danny Boyle, Ewan McGregor, Iggy Pop, Gail Porter, Kirsty Allison, Lisa Moorish, more. 87 min. Widescreen; Soundtrack: English.