Onadesolate,Midwesterncountyroad,aboundmancrawlstowardsaremotepostalbox,managingtoslideablood-stainedplea-for-helpmessageintotheslotbeforeapanickingfigureclosesinbehindhim.ThenotemakesitswaytothecountypostofficeandontothedeskofJasper,aseasonedandskilled"deadletter"investigator,responsibleforinvestigatinglostmailandre...