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After an opening scene at a Washington DC cocktail party where it is demonstrated that "loose lips sink ships", the plot proper gets under way, wherein a group of six men conspire to undermine America's war effort. What is the connection between these six men, all of them outwardly respectable members of Washingtonian society? Hero Don (Clayton Moore) and heroine Alice (Joan Barclay) suspect that the answer lies with the mysterious, wryly philosophical Dr. Melcher (Bela Lugosi), a world-famous plastic surgeon. It turns out that Melcher is part of an elaborate espionage scheme hatched by the dreaded Black Dragon Society of Japan.