Blonde admired Brune's intransigence, who loved Blonde's spontaneity. Blonde had known how to say "yes" and enjoy the secondary benefits of her moral weakness (having a husband, children, in short, something like life)... Brunette had known how to say "no" and patiently suffer the inconveniences of her greatness. But now, after ten years of separation, Blonde arrives at her friend's house and the opportunity arises for both of them to try on each other's lives like trying on a dress.

A murder in Paris’ Louvre Museum and cryptic clues in some of Leonardo da Vinci’s most famous paintings lead to the discovery of a religious mystery. For 2,000 years a secret society closely guards information that — should it come to light — could rock the very foundations of Christianity.