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Weeks after her mother dies, Donna (Donna Anders) and her boyfriend, Michael (Michael Macready), invite Bulgarian emigre Count Yorga (Robert Quarry) to conduct what turns out to be a failed seance. Donna's friends Erica (Judith Lang) and Paul (Michael Murphy) give the count a ride back to his estate and are attacked while leaving. The next day, Erica visits blood specialist Dr. Jim Hayes (Roger Perry), who finds bite marks on her neck and concludes that Yorga is a vampire and must be stopped. Wikipedia