Сouple joined a group sex session with zombie parasites

Anna led her husband into an abandoned building that held her dark past. A door marked with a danger symbol led to the laboratory where her colleagues had disappeared while trying to uncover the crimes of her former boss. The air reeked of chemicals and decay, and the walls bore the same symbols as their old ID badges. Anna wanted to figure out where her colleagues had gone when suddenly they appeared behind her… naked. The zombified bitches pounced on the couple, tied them up, and staged a sex orgy involving parasite infection.