Dirk Pitt, Special Projects Director for the National Underwater and Marine Agency, and his Deputy Special Projects Director, Al Giordino, are traveling to their assignment in the Aegean Sea in Dirk's PBY Catalina when they receive a mayday distress call from the control tower at the nearby Brady Air Force Base on the Greek island of Thásos. The tower reports that they are under aerial attack by a World War I era German Albatros D-3 biplane painted a startling bright yellow and bearing the familiar black Maltese Cross of World War I Germany. The biplane, with its top speed of just 103 mph, is strafing the runways and destroying multimillion-dollar F-105 Starfire fighters and C-133 Cargomasters without a shred of resistance. Dirk and Al, armed with nothing more than a couple of rifles in their World War Two flying boat face-off against the World War I fighter and its machine guns. After a spectacular dogfight they exit the field of battle victorious.