Undercover spy Lord Cordelier Rathbourne never expected that his most dangerous mission would be on England's home shores. As the new Director of Intelligence, he's reunited him with the one woman he never stopped loving: the indomitable Lady Henrietta of the brilliant code breaking Harcourt family.

She remembers his libertine past all too well, and she's determined not to let the infamous rake back into her life. But when Henrietta's brother is kidnapped on a clandestine mission in Paris, she knows Cord is her best hope at saving him. If only that old passion didn't burn so bright between them still...

In their fight to save her brother, Cord and Henrietta must unravel a deadly web of international intrigue. With deadly assassins tracking their every move, Henrietta must trust Cord with more than her carefully guarded secrets–she must give him her heart.