Limping home on two engines, Col. Gallagher is trying to reach the English Channel to safely dump his bomb load before landing. Unfortunately, a German fighter attack triggers the bomb release early, with one finding its way onto an occupied French town that is key in helping downed Allied fliers escape to England. The explosion kills the leader of the local resistance group, angering townspeople into cooperating with the Germans. It also injures the son of the leader's daughter, who brings him to England for treatment...and to find the man responsible for the bombing and exact vengeance.