The plot of the series involves Stark traveling to Japan to build an ARC station and also to test a new armor: Iron Man Dio. Stark intends to mass-produce Dio and then retire as Iron Man. The Dio chest power core resembles the one on the Extremis Armor, but the armor is colored blue and silver rather than red and gold. Dio's head is also slightly redesigned from the typical Iron Man armor with curved features on its faceplate. The Dio armor is stolen in the first episode of the series, and Stark is forced to fight the Dio armor repeatedly over the series. Stark asserts the Dio Armor is a knock-off of the real Iron Man armor, but Dio is demonstrated as being equal to or surpassing Stark's standard armor in terms of performance. Maybe it is because the armor's performance depends on how good the pilot is.