In a hall-of-mirrors Britain, malcontents are held in an ancient, city-sized penitentiary - Prison. Edwin Norris, a dissatisfied showbiz reporter, tries to launch a serious career by investigating the place, only to become a captive himself. Journeying through the grotesque dominions of Prison, he is subject to re-education, joins a protest that becomes a riot and narrowly escapes being tortured to death. His injuries are healed only for him to be used in a medical experiment. Later, he witnesses the prostitution of inmates, tastes prison work and prison privilege. In all this he encounters...