Tony Stark travels to Japan to supervise the construction of a new arc power station and unveil the new mass-production version of the Iron Man suit - Iron Man Dio.

Missing plutonium leads to accusations that Tony is the thief; he dons the Iron Man armor to clear his name.

A weather-control project turns deadly and it's up to Iron Man to stop it.

When Zodiac tries to kill Tony at a racing event, another hero saves him.

An outbreak at the Arc Station leads to Tony and Nagato Sakurai working together.

A Zodiac computer virus infects the Arc Station and then spreads to the city's systems.