In Carcassonne, in the south of France (in the heart of the Occitan - Cathar and Templar country), Marie-Françoise, the Abbess of the Convent of Poor Clares, is arrested on a charge of heresy and witchcraft. A young Dominican inquisitor, Michel, finds himself appointed to interrogate her, his superior having fallen ill, and there being no time to bring in a replacement.
In fact, they have already encountered one another: she once performed a healing miracle in his presence, he considers her a saint, and she herself refuses to speak to anyone other than Michel. Michel, however, is shocked when it transpires that the Church has already condemned her, that the hearing is just a formality, that she is to burn. He insists on listening to her, hearing her story. And what a story it is.
Who is this woman, this healer, whose real name is Sybille and who has brought down the wrath of the Church upon herself? Is she one of the last of The Race, as she claims?
And who is Michel? Is he simply the young monk he seems to be? Or is he something else altogether, as the Abbess, Sybille, appears to believe?
There are wonderful descriptive passages - the dead and dying at the Battle of Creçy, several appalling burnings, one in Toulouse, one in Avignon, and one in Carcassonne, and a description of Avignon and the Palais des Papes that is quite unforgettable:
Heaven and Hell, it is. Never have I ridden through streets narrower, filthier; nor seen more whores, brigands, beggars and charlatans gathered in one place. (They say in Avignon there are so many reliquaries containing a lock of the Magdalen's hair, it must have been long enough to encircle the world; and so many fingers belonging to Saint John the Divine that he was obviously a monster, graced by God with a dozen arms.)
As I neared the Papal palace, my steed atremble as if he sensed the Evil residing there, I saw a platform.
A platform for inquisitors, and before it an execution berm.
It is a book you need to read twice. Not that it doesn't come over first time - it does - I was awed - but when you re-read the Prologue after finishing the book, you suddenly appreciate nuances you missed first-time round, and are drawn on unresisting into Part I again.