SergeantMarkQuinnisapolicemanwhoisknownamonghissuperiorsasextremelypersistent,unrestrainedandmercilessagainstcriminals.Thereasonforthisistobefoundinhispast.Whenhewasachildhewastheonlyonewhohasescapedafamilymassacre,andthemurderersofhisparentswerenevercatched.InthemeantimehewasraisedbyaJapaneseandteachedintheartsoftheNinja.Thetough,longstandingtrainingpaysoffwhenhemeetsthekillerofhisfatheragain…WithallweaponsandthepreciseanddeadlytechniquesoftheNinjahetakesrevengeddd