France, October 1944: Fort Driant may be a 19th century anachronism, but it proves itself an impregnable obstacle to Patton's forces as they fight to seize the city of Metz, a gateway to Germany. Another fortress—a Flying Fortress—may be the key to the fall of Fort Driant. The Moon brothers are in the thick of the battle as Tommy volunteers for Operation Aphrodite, a gambit that turns unmanned heavy bombers into radio-controlled flying bombs of enormous power. But as zero hour for Aphrodite approaches, his brother Sean is trapped in the tunnels of Fort Driant, with the Germans just inches away behind armored doors. It's a race against time for the GIs to take Driant—or escape before the Flying Fortress falls.