In "Captain America: Civil War," the Avengers face a major conflict when the government proposes a law to regulate superheroes. This leads to a split between two factions: Captain America, who believes in personal freedom, and Iron Man, who supports the government's oversight. Their disagreement escalates into a fierce battle, forcing friends to choose sides. As the heroes clash, they confront their own beliefs and the consequences of their actions. The film explores themes of loyalty, responsibility, and the impact of power. Ultimately, the conflict tests their relationships and challenges what it means to be a hero in a complex world.