The story is basically a culmination of story that started with Iron Man, The first Avenger and The Avengers. This movie provides a groundwork for future avenger movies. Even though its a multistarrer it is mainly a captain America story. This movie acts as both the follow on to Age of Ultrons and also equally a sequel to The winter soldier.
The story kicks off with Mission at Nigeria. The sqaud led by captia America, makes the misison successful but at the cost of a dozen lives. This starts off conversation on suoerheroes being free or under some sort of oversight. While Iron man feels oversight is required, Captain america feels otherwise.
Meanwhile countries decide and gather to sign an accord to subject Avengers under global oversight they are attacked by brainwashed a Winter soldier who is friend of Captian America. Thus begins the plot with Captain America going to find his friend before he is pursued by the authorities for attacking the gathering.
Based on their motivation and traits other superheroes align with either Captain America or Iron man and are set on a collision with each other.
The action scenes are too aweosme. Watch in 3D you will definitely love the experience.
A must watch for all the Avengers fan!