Marilyne, a young French girl, is studying in Paris, where she lives a quiet and peaceful life in the company of Herve, a young faculty member. Her life is altered by the behavior of her mother Paula, a woman immersed in vice and corruption, dominated by an easy disposition to love the young people who come to her. Arrangement that leads her to feel a deep passion for her daughter's boyfriend, thus breaking the tranquility of the two young people.
Antonio and Teresa are a couple who live in a flat in San Sebastian. Ursula Michelena, an elderly woman over 70 years old, lives on the top floor. Ursula is secretly in love with Antonio, whom he continually spies from one of the windows of her house. One night she sees Antonio and Teresa making love and that fact excites her violently, in such a way that she asks Antonio for a secret appointment and tells her that she is pregnant and that the son she is waiting for is his. Úrsula, according to her version, has become pregnant looking at Antonio and Teresa making love.
Frank and Roger are shocked by the death of their friend Gene--who apparently has died of an unknown disease--and decide to investigate. They visit the old haunts of their friend and meet Maria, the girl Gene was in love with. They soon discover that Maria has strange supernatural powers and the unexplainable mystery of Gene's death deepens. What really happened to Gene? Was he the victim of an evil force? What is the mystery of the strange and beautiful Maria?