Ten years on, the characters from Trainspotting have returned, this time to make a porn movie. Irvine Welsh sets up a series of neatly timed coincidences to bring them back to Edinburgh along with a new character, the beautiful but bulimic student Nikki Fuller-Smith.
Renton, the one who ran off with the money in Trainspotting, is using the proceeds to run a successful dance club in Amsterdam. Spud, still struggling to stay off heroin, learns about working class history. Meanwhile, Simon 'Sick Boy' Williamson thinks a porn movie with 'a great script and really sound production values' is the way to make money.
Nikki is to be the star and her enthusiasm for the role is matched by the disgust of her feminist flatmate Lauren. The two discuss women and pornography as the movie is made. Although the general conclusion is that porn is degrading, Lauren's arguments are weak and moralistic.
Porno is clever and engaging. The overall impression of the book is that humanity is both brutal and unchanging.