Steve Rogers is finding it difficult to adjust to living life in the contemporary world. He is working for S.H.I.E.L.D. and begins to suspect a mystery is brewing there. He ends up needing to work with Natasha Romanoff, a spy who also works at S.H.I.E.L.D., whose superhero identity is the Black Widow. They end up getting help from yet another S.H.I.E.L.D. agent, Sam Wilson, aka the Falcon, who has the ability to fly. Together this trio of agents/superheroes works together to foil a plot by a new enemy, a former friend who has been brainwashed and has now become known as the Winter Soldier.