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. The Avengers — Iron Man, The Incredible Hulk, Thor and Captain America — assemble alongside Black Widow and Hawkeye to battle an unexpected enemy: the Asgardian God Loki, who commands a powerful Chitauri army threatening global safety and security.