Countess Irina (Lina Romay) lives on the island of Madeira, Portugal, where she must drain the "life force" of men and women for her own survival. One of her lovers/victims is a poet (Jack Taylor) who believes the undead countess is meant for him. Prolific exploitation director Jess Franco filmed this influential erotic chiller - which established Romay (who Franco later married) as an erotic and horror film icon - on location on Madeira.