A crisis in the United States forces the Ultimates into action - and Cap, Iron Man and Thor finally reunite! Meanwhile, Kitty Pryde makes her stand - and as the X-Men fight for their lives in the Sentinel-controlled states, the war for mutant liberation begins! And with the nation under siege, Miles Morales - the new Spider-Man - decides to become a member of the Ultimates. And he will do absolutely anything it takes to earn that right. The Ultimate event of the year is here!