France, October 1918. Though the war is nearing its end, the German enemy refuses to go quietly. When an exhausted officer is found clinging to life at the foot of a tree shattered by shelling and gunfire, he is brought to Bess Crawford's aid station, where she treats his injuries. Surprisingly, the officer is wearing the tattered remnants of a French uniform. Even stranger, he speaks fluent German. When Bess reports her suspicions she receives a plausible explanation. The soldier must be from Alsace-Lorraine, where the tenuous border between France and Germany has continually shifted. Still, Bess remains unconvinced. What was a French soldier doing so far from his own lines . . . and so close to where the Germans are putting up a fierce, last-ditch fight Before she can inquire further, Bess is wounded. Sent to Paris to recuperate, she discovers that her mysterious soldier is also in the French capital . . . but has disappeared. With the unexpected help of Captain Barkley, Bess, a soldier's daughter, embarks on a dangerous hunt to find the man and uncover the truth, even at the risk of her own life.