A chic, good-looking and suitably 70's couple arrive at an extravagant and deserted seaside hotel after eloping. Stefan is wealthy and happily English, with a hidden streak of sadism, while Valarie is intelligent but of inferior (Swedish) blood. To keep her with him at the eerie hotel he lies consistantly about his relationship with his mother and his plans to tell her of their marriage. Meanwhile he has mysterious phone conversations with an older, dominant and pampered sissy. Two fresh guests arrive; the Hungarian countess, Elizabeth Bathory and her voluptuous protege, Ilona. Virgin corpses begin showing up about the city drained of their blood. A wary detective lurks around the hotel taunting his only suspect, the Countess.
The mysterious Jane Janzen hires private detective Barry Haven to find her younger runaway sister Jessica who has been missing for the last three months. He travels to a remote small town called Lost Lake where he meets the free-spirited Trix and together they start to investigate the whereabouts of Jessica. As the investigation progresses Barry becomes involved with an occult sect of strange women called the Daughters of Darkness led by the beautiful, seductive Connie. Each night Barry is drugged and forced to undergo sexual rituals with different members of the sect in preparation for the solstice when Damien will arise again to spread his seed among the Daughters of Darkness, an event that occurs only once every 33 years. However, all is not it seems and little does Barry realize that he is in fact the bait and the real reason that the women have lured him to this town will be revealed on the night of the solstice!
Cruel and cunning misogynistic serial killer Danny (superbly played with creepy intensity by John Karlen of "Dark Shadows" and "Daughters of Darkness" fame) preys on nubile young lady hitchhikers in a small San Francisco town. It's up to tough, determined Detective Vince De Carlo (a fine and convincing performance by James Luisi) and his easygoing partner Mike (a solid Martin Speer; Dee Wallace husband in Wes Craven's horror classic "The Hills Have Eyes") to nab the foul fiend.