In the last gasp of youth, Simon "Sick Boy" Williamson is back in Edinburgh. He taps into one last great scam: directing and producing a porn film. To make it work, he needs bedfellows: the lovely Nikki Fuller-Smith, a student with ambition, ego, and troubles to rival his own; old pal Mark Renton; and a motley crew that includes the neighborhood's favorite ex-beverage salesman, "Juice" Terry.

In the world of Porno, however, even the cons are conned. Sick Boy and Renton jockey for top dog. The out-of-jail and in-for-revenge Begbie is on the loose. But it's the hapless, drug-addled Spud who may be spreading the most trouble.

Porno is a novel about the Trainspotting crew ten years further down the line: still scheming, still scamming, still fighting for the first-class seats as the train careens at high velocity with derailment looming around the next corner.