Although this book was written before Harper Lee's world famous novel To Kill a Mockingbird, it takes place after the events described in that. Jean Louise Finch (Scout) is now a grown-up girl of 26, she has left Maycomb, Alabama and lives in New York.
Once a year, Jean Louise returns home for a two-week visit - that's where the book starts. In this visit, she is confronted with things that shock her deeply. In her father Atticus's documents, she finds a pamphlet referring to the "Black Plague". Jean Louise follows her father and her childhood friend to the Citizens' Council meeting where Atticus introduces a man who delivers a deeply racist speech. Jean Louise is horrified and feels betrayed by her father - who had always taught her that all people should have the same rights, but now seem to represent an entirely different point of view. Jean Louise and Atticus talk about the issue in his office, and to Jean Louise's horrification, Atticus admits openly he doesn't believe black people are ready to receive full civil rights, including the right to vote, as white. Jean Louise is raging because of her father's betrayal, feels lost and alone, curses at her father, returns home and starts packing her things to leave Maycomb forever.
When she is about to leave, her uncle Jack arrives and slaps her in the face - bringing her back to reality. He tells her she has always been idolizing her father, believing that his opinions would always be the same as hers. He tells her she should begin seeing Atticus as a man of flesh and blood, and that Atticus was attempting just that in their earlier conversation.
She returns to Atticus's office and apologizes - but Atticus tells her he is very proud of her. He had always hoped she would grown up to stand up for her own ideas of write and wrong. Jack or Atticus (I fail to remember) tells her persons like her are needed to make significant changes in the world's ideas of racial equality.
Harper Lee shows a variety of emotions and ideas on the post-war racial issues and puts those into the historical context an incredibly accurate way. The fact that this is still highly topical today (with the refugee crises everywhere in the world, the attacks on black people by police officers etc.) made me connect to the story very deeply. Beautifully written.