There is something special about the ancient cathedral in Chartres, with its mismatched spires, astonishing stained-glass and strange labyrinth. And there is something special too about Agnès Morel, the mysterious woman who is to be found cleaning it each...

Gui is a troubled priest who has been shielding his secret family for years. Agnes, his beloved, is a falsely-accused heretic he rescued from the Inquisition’s pyre. Their son Etienne, unaware of his father’s true identity, is coming of...