Jacobite exile Mary Dundas is filled with longing--for freedom, for adventure, for the family she lost. When fate opens the door, Mary dares to set her foot on a path far more surprising and dangerous than she ever could have dreamed. As Mary's gripping tale of rebellion and betrayal is revealed to amateur codebreaker Sara Thomas, she faces events in her own life that require letting go of everything she thought she knew--about herself, about loyalty, and especially about love.