Fugitive scientist Bruce Banner seeks out the Starks for help. But when the army soldiers led by General Thunderbolt Ross co-opts S.H.I.E.L.D. to make an attack, Iron Man must fight and subdue the Hulk in order to save him.

Just a few days before his eighteenth birthday, Tony, Rhodey, and Pepper in her brand new battlesuit travel to China to search for the Mandarin. Gene finds the tenth ring and defeats the last guardian, but the rings—and Gene—harbor a deadly secret. In the meantime, Tony is confronted with the need to tell his father a very important truth...