Heroin addict Mark Renton stumbles through bad ideas and sobriety attempts with his unreliable friends -- Sick Boy, Begbie, Spud and Tommy. He also has an underage girlfriend, Diane, along for the ride. After cleaning up and moving from Edinburgh to London, Mark finds he can't escape the life he left behind when Begbie shows up at his front door on the lam, and a scheming Sick Boy follows.

Convenience and video store clerks Dante and Randal are sharp-witted, potty-mouthed and bored out of their minds. So in between needling customers, the counter jockeys play hockey on the roof, visit a funeral home and deal with their love lives.