WhenBenthamDeQuettevillefallstohisdeathfromaroofafterseeingaheadlesshorseman,hisaristocraticfamilyseemmoreconcernedabouttheirforthcomingCivilWarre-enactmentthantheincident.AsBarnabyandJonestrytofindoutthetruthbehindtheghostlyfigure,theirinvestigationuncoversshockingsecretsabouttheDeQuettevilles.