Paris, 1887. A time when one's own honour was most valued and a duel was a sure way to defend it. Clément Lacazette, the charismatic Master of Arms, has been through many battles and the law forbids him to take part in duels. Marie-Rose Asti de Valsaire cannot challenge her abuser either, as she is a woman. Together they help each other not only to call their enemies to the barrier, but also to find the love that has always eluded them.