The movie begins with the Avengers who are the superheroes and are on the mission of saving humanity. The Avengers are team of four, Steve Rogers, Natasha Romanoff, Sam Wilson, and Wanda Maximoff, who are trying really hard to save humanity and stop crime. The Avengers with their courage and determination prevent the theft of a biological weapon by Brock, but in the course of this, they end up in a fight which leads to disastrous results.
Brock, tries to win in his mission and when he fails in it, he tries to kill one of them. When Avengers try to save themselves from Brock, the destruction of a nearby building takes place due to a blast and it results in the death of several humanitarian workers. Due to this damage, the group of Avengers is divided but captain America believes that there must not be any interference of the government in the work of superheroes.