The alien shapeshifters called the Chitauri were defeated by the Ultimates in a decisive battle, but suspicious activity leads the Ultimates to believe that not all of the aliens were destroyed in that cataclysmic attack. Frustrated by the government's seeming unwillingness to protect its own people, Captain America takes matters into his own hands, leaking the technology so that it can be manufactured and distributed throughout the country. His radical actions sow discord among the Ultimates and within the highest levels of government, raising a troubling question: Could this disunity and chaos be playing right into the Chitauri's hands?