For 30 days, National Geographic film crews gained unprecedented access to chronicle the inner workings of one of the most notorious prisons in the country. About 5,000 inmates are locked up in San Quentin, and over 600 of them are condemned to death by lethal injection. Hear from two 'lifers' trying to make parole, experience the institution through the eyes and ears of the men and women who work there, and witness the aftermath of one of the prison's largest riots in over 20 years.