Captain America ponders the mystery of the Winter Soldier and enlists Nick Fury’s aid to find him when the Red Skull escapes from prison and massive robots – the Sleepers – arise as part of a contingency plan by the founder of HYDRA to destroy Washington, D.C.

When the Hulk’s name is cleared of the crimes committed by the Red Hulk, the Avengers find that the deception put forth by Captain America’s Skrull doppelganger has made the green-skinned juggernaut even more of a loose cannon than before.