Trumble is a minimum security federal prison, home to the usual assortment of relatively harmless criminals - including three former judges who call themselves The Brethren. They meet each day in the law library where they spend hours writing letters. They are fine-tuning a mail scam, and it's starting to really work. The money is pouring in. Then, their little scam goes awry. It ensnares the wrong victim, a powerful man on the outside, a man with dangerous friends, and The Brethren's days of quietly marking time are over.