After George Bailey (James Stewart) wishes he had never been born, an angel (Henry Travers) is sent to earth to make George's wish come true. George starts to realize how many lives he has changed and impacted, and how they would be different if he was never there.
Former marshal Will Kane (Gary Cooper) is preparing to leave the small town of Hadleyville, New Mexico, with his new bride, Amy (Grace Kelly), when he learns that local criminal Frank Miller has been set free and is coming to seek revenge on the marshal who turned him in. When he starts recruiting deputies to fight Miller, Kane is discouraged to find that the people of Hadleyville turn cowardly when the time comes for a showdown, and he must face Miller and his cronies alone.
When the idealistic young Jefferson Smith (James Stewart) winds up appointed to the United States Senate, he gains the mentorship of Senator Joseph Paine (Claude Rains). However, Paine isn't as noble as his reputation would indicate, and he becomes involved in a scheme to discredit Smith, who wants to build a boys' campsite where a more lucrative project could go. Determined to stand up against Paine and his corrupt peers, Smith takes his case to the Senate floor.
