Desnuda inquietud (1976)

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?