At the foot of a tree shattered by shelling and gunfire, stretcher-bearers find an exhausted officer, shivering with cold and a loss of blood from several wounds. The soldier is brought to battlefield nurse Bess Crawford's aid station, where she stabilizes him and treats his injuries before he is sent to a rear hospital. The odd thing is, the officer isn't British, he's French. But in a moment of anger and stress, he shouts at Bess in German. When the French officer disappears in Paris, it's up to Bess, a soldier's daughter as well as a nurse, to find out why, even at the risk of her own life.

Treating an injured soldier from a tenuous border region between France and Germany, World War I battlefield nurse Bess Crawford questions the man's true loyalties and risks her life to solve his subsequent disappearance.

At an aid station in France in October 1918, Bess Crawford, a nurse, encounters an injured, unidentified French lieutenant, who yells in fluent German after being attacked by a fellow patient. Though Bess's matron suggests that the Frenchman is from German-speaking Alsace-Lorraine, Bess isn't so sure. Two weeks later, Bess is shot while in the trenches and is sent to Paris to recuperate, and finds the perfect opportunity to pursue the matter, with the help of Captain Barkley, an American who's ostensibly in the city searching for deserters --