Once again we look into the office of Hank Hawkins, the Sheriff of Punken County, and find him in heavy conference with those two highlights of mail order detecting, Si and Elmer. The precious evidence has arrived at last, as the airplane brought the pictures back from Kansas City. Now, we will listen in on the discussion and see whether Si is moving picture camera was good enough to get a clear picture of the ghostly train that has carried six men off on six midnights...