While on a trip into the jungles of South America, the gorgeous Teresa Burns is bitten by a strange creature. Upon returning home Teresa starts to change, at first she experiences heightened sexual arousal then she becomes consumed with an uncontrollable passion. The mysterious bite has inflicted her with the lust of a wild woman and the killer kiss of a demon. Teresa's boyfriend Paul is detained as the prime suspect of several mysterious murders. He informs the police about his girlfriend's strange behaviour since their return and that it is she who is responsible for the murders. As Teresa's passion grows stronger, so does her bloodlust. Soon the sexual demons within her take over, pushing her to the edge of sanity.