There is something special about the ancient cathedral of 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 morning. No one quite knows where she came from - not the diffident Abbé Paul, who discovered her one morning twenty years ago, sleeping in the north porch; nor lonely Professor Jones, whose chaotic existence she helps to organise; nor Philippe Nevers, whose neurotic sister and newborn child she cares for; nor even the irreverent young restorer, Alain Fleury, who works alongside her each day and whose attention she catches with her tawny eyes, her colourful clothes and elusive manner. And yet everyone she encounters would surely agree that she is subtly transforming their lives, even if they couldn't quite say how. But with a chance meeting in the cathedral one day, the spectre of Agnès' past returns, provoking malicious rumours from the prejudiced Madame Beck and her gossipy companion Madame Picot. As the hearsay grows uglier, Agnès is forced to confront her history, and the mystery of her origins finally unfolds.
