In "Iron Man 2," billionaire inventor Tony Stark faces new challenges as the government pressures him to share his Iron Man technology. Meanwhile, a new villain, Ivan Vanko, emerges, seeking revenge against the Stark family. Vanko creates his own weaponized suit, leading to intense confrontations. As Tony struggles with his health due to the arc reactor in his chest, he also contends with rival Justin Hammer, who aims to outdo him in the arms race. With the help of Pepper Potts and James Rhodes, Stark must confront his past and secure his future as a superhero.