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.