When "Lucky" Luke Ray, a cocky young American pilot volunteers to fly for the French in World War I, he has no idea what's ahead for him. Soon he's in England, under orders from the British Spy Master to rescue Nurse Cavell in German-occupied Belgium, where she's on trial for being a spy. At least he believes that's his mission until treachery in his own ranks puts him in deadly danger. Which one is responsible? The woman he wants? The man he mistrusts? Or has he been set up from the start? Unless he's more lucky than he's ever been, he'll soon be facing a Boche firing squad...