Earth is in grave danger. Asgard God named Loki and hundreds of thousands of his alien troops ready to scorch the earth and everything grounded. Humans clearly outnumbered. Humans have been lost before the war, were it not because of Nick Fury (Samuel L Jackson) and his secret organization, SHIELD
Together with his agent, Nick assembled the superheroes that spread across the earth. They are Iron Man (Robert Downey Jr.), Thor (Chris Hemsworth), Captain America (Chris Evans), and the Hulk (Mark Rufallo). The superhero with superhuman abilities are different and come from different backgrounds.
The process is not easy to collect all the superhero that had to be done. Nick with the help of Black Widow (Scarlett Johansson), Agent Coulson, Maria Hill, as well as Hawkeye (Jeremy Renner) seeks to unite the superheroes become a team, The Avengers Initiative.
Constraints faced was not stop there. The superhero with their own ego of each was difficult to unite into a cohesive team and full cooperation. There was no other way but to unite them as only The Avengers that was the way out against Loki.