There is a prison called Alcatraz prison, which is a federal prison that can not be completely penetrated over the ages. The opposite may have happened once when that federal prison, fortified once in history by twenty-nine years ago, was broken by three criminals - Al Capone and Berdman Robert Stroud. It is the only time prisoners have managed to penetrate it, but those who have been able to penetrate it have not heard about them again through the ages.
It's one of those very difficult exercises in which large emotions, like the compulsion to be free, are reflected in minute actions, like the chipping away at stone with a pocket nail clipper.
It's an austere depiction of the tedious routines of prison life, and of the courage and strength of spirit needed in coping with unpleasant warders, tough fellow-inmates, and a life sentence.
