The Quiller Memorandum

After two British Secret Intelligence Service agents are murdered at the hands of a cryptic neo-Nazi group known as Phoenix, the suave agent Quiller is sent to Berlin to investigate. There, he begins an affair with Inge Lindt, a beautiful young teacher. However, their lives are put in danger after Quiller is kidnapped and taken to Phoenix's headquarters, where he meets Oktober, the mysterious leader of the group.