Lt. Josh McGraw, an old friend of Col. Joe Gallagher and a first-rate but somewhat unprincipled bomber pilot, has been assigned to Gallagher's squadron. McGraw has known and idolized Gallagher since childhood, but always with a dangerous envy. Full for recklessness, McGraw's first gambit with Gallagher is to buzz the field as he arrives. On the ground, McGraw fabricates a story, and, in his pleasure at seeing an old friend, Gallagher lets it pass with a slight warning. The 918th has been assigned a special mission: to bomb a series of bridges in Poland.