France, 1942. The world is at war. The Nazis have stolen the infamous blue diamond, Le Coeur Bleu, intending to barter it for weapons that will destroy the Allies. Jewel thief Hunter Smith is given a choice: help the French Resistance steal back the diamond and avenge the death of his best friend, or stay locked up in an English prison. He chooses revenge.

Resistance fighter Madeleine Bertrand's husband died when he was betrayed by Hunter Smith. How can she now pretend to be married to the arrogant American? How can she betray Jean Philippe's memory by her passionate response to Hunter's kisses?

Neither is prepared for the maelstrom of attraction that erupts between them. To survive, they must uncover the mysteries of the past and conquer the dangers of the present. But first, Madeleine must decide whether her loyalties lie with her dead husband and the Resistance or with the greatest love of her life.