Intriguing book adaptation in which a well-known teacher is haunted by fear of revealing a secret he once confided to a mistress.

Pietro is a respected teacher and Teresa his brilliant young student. After her graduation, they have an affair and one day they tell each other a secret so shocking that it would destroy that person's life. Time passes and Pietro is a well-known writer and father of two grown-up daughters. But always this fear creeps up on him that Teresa will show up and make his secret public....