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Pam Mitchell (Irene Manning), a famous aviatrix, is also an unapologetic isolationist. Her anti-war views clash with the patriotic sentiments of reporter Ward Prescott (Craig Stevens), who is in love with Pam's half-sister, Sue (Maris Wrixon). Soon after the Nazis sink a U.S. ship with supplies meant for England, Ward realizes that Pam tipped off the Germans and helped bring down the boat. Later, Nazis agents kill Pam to make sure she doesn't talk, then set their sights on shutting up Sue. Wikipedia