It's 1915, and Emma Shuster has far too much on her mind to entertain notions of romance... Saboteurs are doing their best to keep the United States out of the Great War. Bridges and factories are being bombed, and ships are being sunk. When Emma's code-breaker father is found murdered and his secret encryption project left unfinished, the navy offers Emma a civilian position cracking intercepted ciphers sent by foreign powers. With enemies lurking at every turn, can she trust even those closest to her? Is romance the true motive behind her two suitors' advances, or could one-or both of them-have traitorous intentions? Emma races to discover the nefarious plans of her country's foes and unmask their leader before more people are killed. And yet, her greatest challenge may be deciphering the cryptic messages sent by her heart.