The book follows FBI Special Agent Aloysius Pendergast and his sidekick, Lieutenant Vincent D'Agosta. Pendergast was last seen at the end of the previous novel, Brimstone, where he was buried alive behind a brick wall in Castel Fosco. His estranged brother, Diogenes, rescues him and nurses him back to health. However this is not a true act of kindness; Diogenes has a dark agenda and needs his brother alive in order to carry out his nefarious plans. Pendergast's ward Constance Greene requests Vincent D'Agosta's presence for a very important meeting. D'Agosta is shown a letter written many months previously by Pendergast about his brother Diogenes. In the letter, Pendergast writes that he does not know of Diogenes's whereabouts, but does in fact know one thing—a date, January 28. D'Agosta presumes that this will be the date of Diogenes's greatest crime. Having been hated by and hating his family, Diogenes obviously cannot be trusted.

ISBN: 9780446576970