Catherine LeVendeur, a young scholar in 12th-century France, has come to conquer her sins at the Convent of the Paraclete: famous for learning, prayer and its abbess, the fabled Heloise.

When a manuscript the convent produced for the great Abbe Suger disappears, rumours surface that the book contains sacrilegious passages and will be used to condemn Heloise's famous lover, Peter Abelard.

To save the convent and protect all she holds dear, Catherine must find the manuscript and discover who altered the text. Risking her life, and the wrath of Church and family, she confronts an evil older than Time itself . . .