An otherwordly perpetrator has been attacking female virgins in Manhattan. As Dr. Pace and Detective Andriotti work together to identify the strange organic materials found on the women, the victims begin arising in a trance and leaving the hospital.

Neo, a drifter from the atomic-blasted wastelands, arrives with his klutzy robot sidekick at a factory where slaves labor to fuel the sinister Dark One's Power Station. There, he meets a comely woman who convinces him to help rescue her scientist father, who has invented a device that can break the Dark One's control over the slaves. Gathering a motley crew of allies on the way, Neo and pals travel to the Power Station, where they confront the Dark One's evil servants.

A reincarnated "Satanic Witch" from New Amsterdam, circa 1600's comes back to revive her cult members by sucking the life force out of people.