Renegade sea captain Ryan Coleraine is persuaded to accompany the adventurous Raveneau family to Regency London to spy for America during the War of 1812. The cynical Coleraine must take the place of their son, who is in the West Indies, and pretend to be a fop. Lindsay Raveneau, a beautiful and independent bluestocking, finds herself with a "brother" who challenges and arouses her in the most unsettling ways.
Danger, intrigue, and forbidden passion mount as as Ryan and Lindsay carry their daring masquerade to the elegant drawing rooms of Regency society. Adding to the tensions are Lindsay’s parents who must attempt to chaperone their daughter and her "brother" under their own roof!