A new patient mysteriously appears in a psychiatric ward. He claims to come from another planet to study humans and their behavior. The alien is gentle but criticizes humans for their harsh treatment of each other. The assigned psychiatrist is himself unhappy, and affected by the patient's insight. But he is ordered to treat the patient according to institutional procedure.
In 1847 Buenos Aires, a young noblewoman and a young Jesuit fall in love, much to the disapproval of her family and the Church.
When the new don discovers that sadistic mobsters were responsible for the death of his young son, he wreaks a deadly revenge.
