Nino and Caterina have been married for 65 years and have loved each other deeply since the first moment they saw each other. When Caterina dies, their daughter Elisabetta, trying to help her father to overcome the loss, hires editor Amicangelo to write a book on their love story. Amicangelo accepts the job only for financial reasons and immediately clashes with the personality of a man who seems to be his exact opposite. But the relationship between the two will grow deeper every day until it turns into a sincere friendship.