api ro ▁goes ▁missing , ▁Bor lak ▁k ills ▁the ▁man ' s ▁wife ▁and ▁threat ens ▁his ▁daughter ▁Jen ny ▁( R ik ki ▁Br est ), ▁who ▁is ▁res cu ed ▁by ▁her ▁new ▁love , ▁young ▁v amp ire ▁Billy ▁( And re ▁Frauen stein ) ▁whom ▁she ▁has ▁coinc ident ally ▁just ▁met ▁in ▁a ▁local ▁night club . ▁Bor lak ▁is ▁then ▁joined ▁by ▁Billy ' s ▁ex - g irl friend ▁Lisa ▁( Christ ina ▁Storm ) ▁who ▁is ▁hoping ▁to ▁sab ot age ▁Billy ' s ▁new ▁relationship . ▁Billy ▁joins ▁forces ▁with ▁police ▁officer ▁and ▁v amp ire ▁h unter ▁Joe ▁K au ▁( H l om la ▁D and ala ) ▁to ▁defeat ▁Bor lak ▁and ▁destroy ▁the ▁ser um , ▁but ▁not ▁before ▁Jen ny ▁is ▁killed ▁during ▁their ▁final ▁confront ation . ▁In ▁the ▁end , ▁Billy ▁allows ▁K au ▁to ▁kill ▁him ▁as ▁well ▁in ▁order ▁to ▁reun ite ▁with ▁his ▁lost ▁love . ▁ ▁Cast ▁▁ ▁H l om la ▁D and ala ▁as ▁Joe ▁K au : ▁ ▁A ▁police ▁detect ive ▁with ▁a ▁belief ▁in ▁v amp ires ▁that ▁is ▁dismiss ed ▁and ▁rid ic u led ▁by ▁his ▁pe ers . ▁ ▁David ▁James ▁as ▁Bor lak : ▁ ▁A ▁violent , ▁reb elli ous ▁and ▁am bit ious ▁v amp ire ▁that ▁wants ▁to ▁" c laim ▁the ▁rights ▁of ▁the ▁Johannes burg ▁cl ans " ▁and ▁walk ▁in ▁the ▁day light ▁so ▁as ▁to ▁defeat