The story concerns an attempt by fifth columnists to gain control of Australia's supplies of wolfram, a mineral used in the manufacture of munitions, involving a new wolfram field owned by Francis Jamieson (Marshall Crosby).
Overview：The story concerns an attempt by fifth columnists to gain control of Australia's supplies of wolfram, a mineral used in the manufacture of munitions, involving a new wolfram field owned by Francis Jamieson (Marshall Crosby).
