THE AVENGERS S.H.I.L.D                                                  Loki (Tom Hiddleston) returns to Earth sent by Chitauri,an alien race that plans to dominate men.With the promise that will be the ruler of the planet,he steals the cosmic cube inside premises of SHIELD.and, thereby, acquires great powers.
Loki uses them to control the dr. Erik Selvig (Stellan Skarsgard) and Clint Barton / Hawkeye (Jeremy Renner), que passam a trabalhar para ele.In order to keep them, Nick Fury (Samuel L. Jackson) summons a group of people with great skills,but they had never worked together before: Tony Stark / Iron Man (Robert Downey Jr.), Steve Rogers / Captain America (Chris Evans), Thor (Chris Hemsworth),Bruce Banner / Hulk (Mark Ruffalo) and Natasha Romanoff / Black Widow (Scarlett Johansson).But, despite the great danger that occurs in the earth is not so simple contain the ego and the interests of each of them so that they can act as a group.