WhoreallyisDiabolik,theruthlessItaliancomicbookantihero?ThefinalchapteroftheManettiBros.adaptationsetsouttofindtheanswer.
　　Takingaleapintimetothe1970s,aperiodofunrestmarkedbytheVallanzascaandMaglianagangs,studentprotestsandstreetkillings.Thestorybeginswithcarchasesandmachinegunshotsthatleaveinnocentvictimsdeadonthestreet.It’snotDiabolikpullingthetrigger,ashehashisowncodeof‘professional’ethicsandonlykillswhennecessary.Instead,it’sagangofcriminalsresponsibleforthebloodshed,wreakinghavocinthecitywithgratuitousandunscrupulousviolence.Capturedbythegang,Diabolikandhisnemesis,InspectorGinko,findthemselveslockedinacellwithnowayout.