Trumble is a minimum security federal prison, home to drug dealers, bank robbers, swindlers, embezzlers, tax evaders - and three former judges who call themselves The Brethren. The Brethren meet each day in the law library, where they spend hours writing letters. They're fine-tuning a mail scam, and it's starting to pay big. The money is pouring in. But when their little scam goes awry and ensnares the wrong victim, a powerful man on the outside, they realise they're in trouble. Because this man has dangerous friends, and just as the prison failed to protect society from the Brethren, it won't protect them from their victims.