Heavy metal songwriter Adam (Thomas Bern) ignores his devoted girlfriend, Pat (Ashlyn Gere), because he's obsessed with Lily (Sylvia Summers), a seductive woman haunting his dreams. When he uses black magic to bring Lily to life, he discovers too late that she is a murderous succubus. Although Adam is held spellbound by Lily, Pat fights back against the creature when she begins slaughtering the drunken college students partying at their home.