1682: Disowned and desperate, Rachel Downing is coerced into delivering a top-secret English document to the Frenchman who holds her younger sister as collateral. When her speeding carriage overturns en route from London to Dover, she takes advantage of her enigmatic rescuer's offer to accompany her. She'll save her sister, receive payment for the document, and claim her family estate before it’s sold.

Royal Elite agent Stephen Fletcher, trained in sustaining England’s security, is hired to catch the thief who stole the map depicting the location of English battleships. Waylaid by the beauty in the carriage accident, he decides to use her to his advantage: concealment of his mission. He’ll find the thief, recover the document, and earn a rich payment—enough to buy the grand estate for sale.

Stephen and Rachel struggle to hide their identities while fulfilling their tasks—a rather dangerous prospect when they’re also falling in love.