When Nick Fury (Samuel L. Jackson), the director of an international peacekeeping agency known as S.H.I.E.L.D., encounters an unexpected enemy that threatens global safety and security, he finds himself in need of a team to pull the world back from the brink of disaster. Spanning the globe, a daring recruitment effort begins for Earth’s mightiest heroes. Iron Man (Robert Downey Jr.), Captain America (Chris Evans), The Incredible Hulk (Mark Ruffalo), Thor (Chris Hemsworth), and two of the world’s greatest assassins, Black Widow (Scarlett Johansson) and Hawkeye (Jeremy Renner), must assemble to defeat Loki (Tom Hiddleston), the darkest villain the Earth has ever known.