The Pelican (1974)

Paul has been imprisoned for ten years for passing counterfeit money. He feels victimized enough, both for the prison time and for the crime which led to it; he committed the crime to give his wife the nice things she asked him for. When he discovers that she has remarried a quite wealthy man, he is outraged. However, his ire is not due to her disloyalty to him; he loved their only son to distraction, and now the boy has no knowledge or memory of him.