With the Avengers, minus Ant-Man, turned into Gamma Monsters, Hawkeye must convince the Hulk to help fight the Leader and the Abomination while Thor (who was unaffected by the Gamma Dome) fights the Absorbing Man.
With Abomination, Crimson Dynamo, Wonder Man, Enchantress and Executioner on his side, Baron Heinrich Zemo leads them as the Masters of Evil in a systematic takedown of the Avengers.