At a secret research base deep below the surface of the Earth, SHIELD is working on unlocking the power of a mysterious energy source known as the Teseract.
But when Loki launches an assault on the base and steals the power source, Nick Fury realises that Earth may be facing its most lethal threat.
He assembles a superhero team consisting of Iron Man, Thor, Captain America and The Hulk in order to prevent an invasion of Earth but a deadly race of intergalactic warriors. But will the heroes be able to come together as a team to save the planet?
Robert Downey Jr as Iron Man
Chris Evans as Captain America
Chris Hemsworth as Thor
Mark Ruffalo as The Hulk/Bruce Banner
Samuel L Jackson as Nick Fury