""Nazis are sabotaging British war plans at an alarming rate. Sherlock Holmes is brought in to find the person behind ""The Voice of Terror"" a German spy within the ranks of British intelligence.Professor James Moriarty Sherlock Holmes''s mortal enemy wants to get his hands on a revolutionary new bombsight. It''s up to Holmes and his faithful sidekick Dr. John Watson to protect the man who invented the device from falling into the clutches of Moriarty and the Nazis. A microfilm containing Allied plans is missing in Washington D.C. Holmes and Watson travel to America to help find the film before it''s captured by the evil Nazis.Heirs of the Musgrave fortune are dropping like flies at their family''s huge mansion. Holmes attempts to get to the bottom of the situation before Sally Musgrave the last living heir to the fortune is murdered..""