A Christmas Carol is a classic tale of redemption and second chances. Written by Charles Dickens, it tells the story of Ebenezer Scrooge, a miserly old man who is visited by three ghosts on Christmas Eve. Through their guidance, Scrooge realizes the error of his ways and resolves to change his life for the better. The story has been adapted into various forms, including films and musicals, making it a timeless holiday classic.