In Japan, Tony Stark supervises the construction of an Arc Station and, planning to retire as Iron Man, readies the Iron Man Dio armor for a successor. However, the prototype's test flight fails and the test pilot becomes brainwashed during targeting practice, attacking his colleagues. After diagnosis reveals the Dio suit was hacked by an outside source, Tony reactivates his classic Iron Man armor and neutralizes it, then battles and defeats Scorpio - a warrior of the Zodiac order. Afterwards, Tony finds the Dio suit missing.