Drug film cuts off his arm

The true story of mountain climber Aron Ralston's remarkable adventure to save himself after a fallen boulder crashes on his arm and traps him in an isolated canyon in Utah.

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.

After 20 years abroad, Mark Renton returns to Scotland and reunites with his old friends Sick Boy, Spud and Begbie.