Loki, Thor's half-brother, returns, and this time he is not alone. Earth is on the brink of enslavement, and only the best of the best can save humanity. Nick Fury, head of the international organization Shch.I.T., gathers the outstanding champions of justice and goodness to repel the attack. Led by Captain America, Iron Man, Thor, The Incredible Hulk, Falcon Eye and Black Widow go to war against the invader.