The Nude Vampire

In a strange laboratory men in weird masks take the blood of a naked young woman. Another woman in an orange nightgown is wandering the streets and is followed by a group of people also wearing weird masks. The woman comes across a man named Pierre who tries to help her but the masked men corner them and shoot the woman; Pierre escapes unharmed. The masked men take the woman into a building and the man follows. Guests then arrive for some sort of party, but Pierre can't get into the building. His father is behind it.