"The Dark Knight Returns" is a graphic novel that tells the story of an older Bruce Wayne, who comes out of retirement to become Batman once again. Gotham City has fallen into chaos, and crime is rampant. As he dons the cape and cowl, he faces not only criminals but also his own physical limitations and the changing world around him. As Batman battles new foes like the Mutant Gang and confronts old adversaries such as The Joker, he also faces opposition from the Gotham City Police and even Superman. This story explores themes of aging, heroism, and the moral complexities of vigilantism, making it a landmark in comic book history.