In the conversation, Katerin had said that the Germans wanted her to work with an Italian nuclear physicist named Polda. The OSS land Alvah in Italy from a British submarine and he is hidden by an attractive member of the Resistance, Gina. He manages to obtain a brief conversation with Polda, who agrees to work with the Americans only if the OSS first frees his daughter Maria, who is being held by the Germans. The OSS raid on the building is successful and in an isolated safe house they deliver Maria to her father. He is horrified, because the woman is not his daughter but a German agent, who says the house is surrounded by German troops. In the ensuing gun battle, Alvah and Gina smuggle Polda out through a tunnel from the house to a nearby well and struggle across country to a rendezvous with a British aircraft which will fly them out. Polda and Alvah board it safely; although there is room for her, Gina says she must stay behind to free her country from the Germans and begs Alvah to come back for her when the war is over.