Having at last cleared her name after nearly two years as a notorious fugitive, seventeen-year-old piano prodigy Elly Robin learns that her true love, Edwin Friend, has finally realized his dream of flying for the American Escadrille, and she travels to war-torn France to reunite with him. But Edwin's plane has been shot down over Germany, compelling him to undertake a desperate journey through an alien land.

While Elly's search for Edwin entangles her in a series of exploits--driving ambulances, fighting aerial duels--culminating in a perilous espionage mission for which she too must travel behind enemy lines...