Quint Munroe loses his friend, Squadron Leader Scott, on a mission to destroy a group of German V-1 launchers. He breaks the news to his wife Beth, with whom Quint had once been involved. In the months that follow, he and Beth slowly rekindle their romance — meanwhile, the German V-weapon program continues to advance. Quint is given the task of destroying the V-weapon plant at Charlon, a mission made possible by the crew of the so called “Mosquito bombers”. This small twin-engine plane made largely of wood, flew faster than almost any fighter on the German side, carrying a maximum load of two bombs, and was employed on specialized missions that required pinpoint accuracy on a precise target. Just before the mission is, the Germans drop a film showing air prisoners, including a still-alive Scott, being moved to Charlon. Now the Mosquito crews would be killing their own colleagues, but Quint must carry out his orders. The secret gets out to the squadron pilots, however, and a rebellion starts brewing in their ranks.