Aron Ralston has always lived for adventure, but on a hiking trip in Utah, he has a seroius accident. As he climbs across a canyon, a boulder falls and traps his right arm against the canyon wall. For six days, Aron is trapped. No one knows where he is and he has very little food or water. As timeruns out, Aron has to make a terrible decision: to amputate his own arm.