When an unexpected enemy emerges that threatens global safety and security, Nick Fury, Director of the international peacekeeping agency known as S.H.I.E.L.D., 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. Iron Man, The Incredible Hulk, Thor, Captain America, Hawkeye and Black Widow team up to save the world.