The 918th Bombardment Group bombs a target in Wesselhaven, Germany and evade Nazi fighters by flying south into North Africa on the first leg of a shuttle raid. Luftwaffe Colonel Falkenstein, enraged by the American's new tactics, takes four fighters after Col. Joe Gallagher's group. In the meantime, Gallagher's plane has developed engine trouble and is forced to temporarily land in Yugoslavia, hopefully to repair two damaged engines. On the ground after a harrowing landing, Gallagher and his crew are captured by a menacing band of Yugoslavian Partisans.