(W) Larry Young (A) Jon Proctor Fifty years from now, an elevated highway spans the nation. The U.S. government grounded commercial airline flights and built 'The Black Diamond' under the guidance of project leader and chief architect, Jim Maddox. Maddox's daughter Kate has become an engineering savant in her own right and has a happy marriage to to Dr. Don McLaughlin, DDS. But when the government decides to clean up the Black Diamond heading East - and Kate is kidnapped as a hostage by forces l.
