简介：TheFifthHorsemanisthestoryofKeiji,ayoungImperialJapaneseArmy(IJA)medicassignedtotheinfamousUnit731'smedicalexperimentationfacilitycommandedbyhisfather.KeijihasalwaysbelievedUnit731'sworkiswrong,butasafailedmedicalstudenthehasbecomesoconsumedbyhisdesiretoearnhisfather'srespectthatnothingelsematters.EverythingchangeswiththearrivalofacapturedAmericanpilot,whomKeijisoonbefriends.Inspiredbyhisnewfriend'scourage,KeijithrowsofftheshacklesoftraditiontoriseupagainsthisfatherandbringUnit731toitsknees.…