In Pride and Prejudice, part 3 begins with Elizabeth Bennet still in Kent, visiting her friend Charlotte Lucas, who is now married to Mr. Collins. While there, Elizabeth receives a letter from her sister Jane, who is staying with their aunt and uncle in London. Jane's letter reveals that Bingley, whom Jane had hoped to marry, has left for London without any warning, and that his sister, Mrs. Hurst, has told Jane that Bingley will not be returning to Netherfield.
Elizabeth is concerned for Jane and decides to return home to Hertfordshire to be with her. On her journey home, she encounters Darcy, who has also been visiting his aunt in Kent. Darcy tells Elizabeth that he has come to apologize for his behavior at the Meryton assembly and for hurting her feelings. He admits that he has been foolish and prideful, and that he has come to understand that he was wrong to judge Elizabeth and her family based on their social status and lack of wealth.
Elizabeth is surprised by Darcy's apology and begins to see him in a new light. She begins to realize that she may have misjudged him as well and that her own pride and prejudice may have blinded her to his good qualities.
Upon arriving home, Elizabeth finds that her sister Lydia has run away with the irresponsible Mr. Wickham, causing great distress to the entire family. Darcy, who had previously saved Lydia from a disastrous elopement with Mr. Wickham, offers to help the Bennets find Lydia and bring her home safely. Elizabeth is grateful for Darcy's assistance and begins to see him as a kind and noble man.
Eventually, Lydia and Mr. Wickham are found and married, and Darcy and Elizabeth confess their love for each other and become engaged. The novel ends with the two of them happily together, having overcome their pride and prejudice and learning to see and appreciate each other for who they truly are.
In part 3 of Pride and Prejudice, the themes of pride and prejudice are explored as both Elizabeth and Darcy come to recognize and confront their own biases and mistakes. Through their journey, they learn to let go of their pride and embrace love and understanding, ultimately finding happiness together.