Gerard Sorme has been hired by a New York publisher to edit a book on Esmond Donelly, notorious 18th-century Irish rake, friend of Rousseau, Boswell, and Horace Walpole, and author of a bawdy work on the deflowering of virgins.
Sorme's quest for information on Donelly takes him to the home of a pyromaniac and flagellant in Baton Rouge, the labyrinthine corridors of the British Museum, and a remote castle in Ireland. As he digs deeper into the mystery of Donelly, Sorme uncovers a tale of intrigue, conspiracy, and murder involving a secret society, the Sect of the Phoenix, that dates back to medieval times. But the Sect still exists, and Sorme's researching has not gone unnoticed by powerful men who have their own reasons for wanting the truth about Esmond Donelly to remain hidden...