When their carriage loses a wheel while traveling over the BorgoPass, the five stranded passengers, Imre Polvi [ Vic Winner] and four young women --Karen [Kaydee Politoff], Senta [Rosanna Yanni], Marlene [Ingrid Garbo], and Elke [MirtaMiller] -- are forced to seek refuge at the KlinikDr Kargos. It was near here, Imre explains to the girls, that JonathanHarker and Professor van Helsing finally put an end to the king of thevampires, Count Dracula. The sanitarium once held the laboratories of DrKargos, who was hanged for his unsavory research in blood studies. It hasrecently been purchased by an Austrian physician, Dr Wendell Marlow [Paul Naschy], whois agreeable to putting up the travelers until supplies arrive in a weekand they can hitch a ride back to Bistritz.The first night in the somewhat rundown sanitarium (Marlow is havingdifficulty hiring local workers) seems to go well. Karen and Senta share aroom while Elke, Marlene, and Imre have their own rooms, although Imrefinds his way to Marlene's bedroom for a little lovemaking. When Karenleaves her room to close a window banging in the storm, she runs into avampire, but Marlow returns her to her bed, assuring both Karen and Sentathat it must have been a tramp taking refuge from the bad weather. Thenext day Marlene and Imre go off alone while the other girls swim in thepool and explore the sanitarium, ending up in a library where they find anold book about Dracula's immortality that foretells a time when a truevirgin will fall in love with Dracula and give herself to him willingly.When this happens, Dracula will be restored to his full power and willrule mankind for all eternity, and his daughter Radna will also beawakened.The second night, as Imre makes his way to Marlene's room again, heis attacked and bitten by the vampire/tramp. When Imre finally makes it toMarlene's room, he bites her, too. Meanwhile, Karen can't sleep, so sheleaves her bedroom and finds Marlow sitting in a chair, reading. SinceMarlow has been gone all day (checking his traps, he says), they take astroll together and talk about his lonely life. The next morning, thegirls notice that Marlene and Imre have disappeared but chalk it up tothem going off together and getting lost in the forest. The girls spendthe day looking for them, until Senta gets her foot caught in one ofMarlow's traps. When they return to the sanitarium, Marlow begins to cleanup the blood but then relinquishes the duty to Karen so that he can getsome disinfectant.During the night, Marlene bites Elke's neck. Senta wakes up and pokesher head outside her bedroom door. She sees Marlow walking down the hall.Senta has had the hots for Marlow since the day they arrived, so sheinvites him into her bed and he is all too happy to join her, although hedoes lecture her afterwards about how they shouldn't have done this.Besides, Senta is not a virgin. Meanwhile, Imre tries to put the bite onKaren, but her scream brings Marlow running. Marlow bests Imre and tosseshim out the window. Imre falls on a stick of some sort and is impaled.Suddenly, Karen is attacked by the vampire/tramp. Marlow fights with him,but the tramp seems to be getting the best of Marlow, until Marlow catchesup with him and drives a stake through his heart. Karen cowers in Marlow'sarms and reveals that she's in love with him. Marlow promises that theywill leave tomorrow.When Karen wakes up, Marlow is gone. She goes in search of him andhears him calling her. She follows his voice into a chamber of coffins andfinds Marlene, Elke, and Senta (who has now become a vampire) waiting forher. Marlow reveals himself as Dracula and tells Karen of his plan to useher to cause his final rebirth along with the rebirth of his daughterRadna, then he cuts Karen's neck and drinks her blood. With the firstceremony completed, he imprisons Karen to wait until the next full moonwhen they will perform the second ceremony.When the next full moon comes around, the three vampiresses kidnap avirgin from the village and whip her until her blood flows. Then they hangher upside down over Radna's coffin and slit her neck. At the same time,they slit Karen's wrist so that Karen's blood will mingle with theinnocent virgin's blood, both combining to give life to Radna. After goingthrough all that in order to awaken Radna, however, Dracula/Marlowdecides, out of love for Karen, not to awaken Radna and has her coffintossed in a lake. He stakes Senta through the heart and hangs Marlene andElke out in the sun to fry. But, when Dracula/Marlow asks Karen torenounce her mortal life and unite with him, Karen refuses, so he thrustsa stake through his own heart and turns to dust. Alone now, Karen beginsthe long walk over the mountains to Bistritz.Original Synopsis by bj_kuehl.