Please answer the following question: Generate a question that has the following answer: Hlne for the following movie plot: When they were children, Catherine [Francoise Blanchard] and Helene [Marina Pierro] swore blood oaths that they would always love each other and, whomever died first, the other would follow. It was Catherine who was first to go. She was laid to rest in the Valmont crypt underneath the family castle. Two years later, however, some men reawaken Catherine while illegally dumping toxic waste in the Valmont vault. Unfortunately, Catherine now requires the blood of the living to survive.Having just returned from a lengthy trip, Helene telephones the Valmont castle which, unbeknown to her, is up for sale. Catherine, who is a virtual zombie, picks up the receiver while playing a musicbox that she and Helene shared. Not knowing who answered the phone, Helene pays the castle a visit, only to find Catherine and the dead bodies of the waste dumpers, the real estate saleswoman, and her boyfriend. Concerned for Catherine, Helene cleans up the mess, thinking that Catherine is sick and that her death was faked. When Helene realizes that Catherine needs human blood, she begins to lure young women to the castle to provide it, while trying harder and harder to bring Catherine out of her catatonia. It's working. Catherine is beginning to "wake up" and become less and less of a zombie. She regains the ability to speak and to recognize the nature of her emotions. She also comprehends that she is "evil," a living dead girl, and refuses to drink any more blood. She begs Helene to kill her, but Helene refuses.Meanwhile, Barbara Simon [Carina Barone] and her American friend Greg [Mike Marshall] are in town taking photographs. Barbara shot a picture of Catherine walking through a field and has become interested in her. Barbara begins asking the townspeople if they recognize the girl in the photograph. In all cases, she is identified as Catherine Valmont who died two years ago. But Barbara just took the photo a day ago so this is impossible according to Greg, who thinks the girl is just a Catherine lookalike. Barbara decides to pay...
Answer:
Who kills Barbara and Greg?