Barely snagging Lady Lillian out of danger, Lady Sarah finds herself embroiled in some clandestine mischief. It causes her to doubt Lord Archer and her own feelings for him. But this fashion loving countess is not able to give up on her dreams and love for him. She enlists the aid of her two best friends to piece together what might really be happening. For she couldn't bear it if he was a traitor to the crown.

Lord Archer's hero in the spy organization he and his family had long been a part of are in Edinburgh to reveal a traitor to the crown. Only, his boss wants him to spy on the woman he loves and the best friend of her and his own sister. Could he have really fallen in love with a traitor? He keeps his own counsel from his boss. Upon deciding that there is no way his beloved could be a traitor, he recruits them all to uncover the dark underworld doings which could lead to Queen Victoria's death.

While their lives and love are under attack, the two of them work to bring down one of England's most powerful lords before he can kill the Queen.