Born Geneviève Saint-Georges, she reigned as the belle of Paris until the French Revolution sent her fleeing to England. Now, she leads a daring double life: By day, having entered into a marriage of convenience with her cousin, Lord Justin Trevelyan, she plays the role of a silly, scatterbrained wife, for whom he has little time or inclination --- much less love. But at night, masked in scarlet and known as the "Crimson Witch," Geneviève is the wanton smuggler who sails across the English Channel to rescue French aristocrats from the guillotine. One night, as she sneaks across the rooftop of one of the most-heinous prisons in all Paris, Geneviève comes face to face with her male counterpart --- an infamous spy and master of disguise known as the "Black Mephisto," with whom she is fated to fall in love. For only he can match her exploit for exploit, sword thrust for sword thrust, as they carry out their dangerous masquerade in the name of freedom and revenge.