Devious and valiant, Francis de Brangelton has never failed in any of his exploits. When the Duchess de Montmurrant employs him to investigate the embezzlement of her investments and to settle a grudge, he does not hesitate to recruit his friend Henri d'Arringnon. But Francis has no idea of 'Henri's' astonishing secret. Henrietta d'Arringnon has masqueraded as 'Henri' for so long that neither a military skirmish at the Savoy border nor guard duty in Versailles has exposed her. When her true identity is revealed, Henrietta's and Francis' friendship shatters but duty still calls. Will Francis and Henrietta fulfill their commitment to the Duchess? And will the lure of fortune bring them together or further tear them apart?

Adventure, mystery and romance in 18th century France. 1712 – Marseille, France. A greedy crook plots a heist of priceless paintings and compromising portraits. An ambitious Knight of St. John modifies his orders involving sacred relics. When their goods go missing during an unexpected free-for-all in Marseille Harbor, their plans shatter. Facing unpleasant consequences, the crook and the Knight independently blame their respective losses on the mysterious Marshall cousins. 1718 - Paris, France. The young, adventurous, and sword-wielding Charlotte de Brangelton must choose between two young men; meanwhile her lust for adventure leads her to seek the notorious and elusive Marshall cousins. Her womanizing brother Henri and his haughty friend Antoine reluctantly follow her into intrigue and danger… Are the goods lost in Marseille gone forever? Or will these goods be restored to their rightful owners? What will happen to the infamous cousins? And which young man will win Charlotte’s heart?