Onaleaveofabsencefromthepoliceforce,LutherislayinglowinarundowncottageontheedgeofEnglandbutavisitfromhisoldcolleaguesattheMetbringsashockingpieceofnewsthatdrawshimbacktoLondoninsearchofthetruth.Meanwhile,agruesomeserialkillerhasstruckthecity.Withatrailofcluesleadingfromonecrimescenetothenext,Schenkandhisteammustworkoutthetwistedlogicthatconnectseachvictimbutthismurderingmastermindismorethanamatchforthepolice,outsmartingthemateverystep.It’snotlongbeforeLutherisbackintheBullpen,determinedtostealamarchonthekillerbeforeit’stoolate.