Captain America: The Winter Soldier picks up two years after the alien invasion of New York we saw in The Avengers.
Steve Rogers (Chris Evans) - better known as Captain America - is living a quiet life in Washington DC. But he is still finding it hard to adjust to the modern world.
Rogers is now a full-time agent for the spy agency S.H.I.E.L.D., often teaming up with Natasha Romanoff, also known as the Black Widow (Scarlett Johansson).
But the Captain's moral code is making it difficult for him to accept S.H.I.E.L.D.'s style of operating. The organisation's newest development, "Project: Insight", uses satellite technology to prevent crimes before they have been carried out, constantly monitoring what everyone is doing.
Then an assassination attempt is made on S.H.I.E.L.D. director Nick Fury (Samuel L. Jackson). The mysterious Winter Solider (Sebastian Stan) bombs Fury's car, but Fury manages to escape and give the Captain a flash drive full of vital data. The Captain is thrust into action.
The information on the flash drive warns the Captain that the lives of 20 million people could be at stake, all due to a new plot hatched by Hydra, a powerful terrorist organisation.
Along with the help of ex-military paratrooper Sam Wilson, known as Falcon (Anthony Mackie), Captain America must prepare to face the Winter Soldier and defend America from Hydra.
Evans says that the Captain's struggle to adjust to modern society at the start of the film adds depth to his character. The Captain was preserved in ice in the 1940s and brought back to life in the first film.
"Captain America [has] a certain sense of loneliness, given the fact that everyone knows who he is, but he doesn't know anyone. All of the people he knew are gone, and there are many things that he struggles to understand," says Evans.
One of the film's main draws is certainly the stellar fight scenes involving the Winter Soldier, including one in a lift.
"Cap[tain] doesn't fly [and] he doesn't shoot lightning bolts," says Evans. "He punches and kicks, so with that type of combat, you have the liberty to get grittier."
In his last solo outing, the Captain practised a simple boxing style. Now the hero shows off an impressive array of modern styles of fighting and movement, including parkour, Krav Maga and more, not to mention using his trusty shield.
To add authenticity, the Russo brothers, who direct the film, made sure the actors themselves played out as many of the fight scenes as possible.
"Everything you see in the film, anytime their faces are on camera, those are the actors and they're actually doing the things that they're doing," says Joe Russo.
And if you are a big Marvel fan, make sure you hang around for the credits. They include two hidden scenes that hint at the next Marvel film, so whatever you do, don't leave your seat!
Opens on April 3