Private Matthew Petticrew arrives in France as part of the American Expeditionary Forces, an arrival which a war-weary France desperately hopes will help to end the turmoil. Having faced unthinkable things on the front, he is captivated by the sound of a lullaby, sung by a voice so pure he knows he must have imagined it. But rumors sweep through the trenches like wildfire, dubbing the voice "The Angel of Argonne," a mysterious presence who leaves...