Season 1 of IGPX: Immortal Grand Prix premiered on October 5, 2005.

In the year 2048, people are raving about a fighting race called “Immortal Grand Prix”, or IGPX in short, which is faster and more exciting than any of the existing motor sports. The phenomenon is so big that an entire city was built for the racing industry where competitions take place on a huge track. In the “Immortal Grand Prix,” two teams of three IG machines, high-tech humanoid mechs driven by humans, race at speeds greater than 400km/h. The teams make three laps of a 60 km course while intercepting the opponent as they vie for a first place finish. The best machine performance, the best pilots and the best teamwork are the only factors that can make them the winners.

Season 2 of IGPX: Immortal Grand Prix premiered on January 25, 2006.

Team Satomi has just been deemed as the winners for the IG-2 lower league and now join the top IG-1 competition. But it's not going to be easy. Young pilots Takeshi, Liz, Amy, and River are going to have to be a team to be number 1, however one thing leads to another with these four. Most important of all, their opponents overwhelm Team Satomi in every aspect, including strategy and skill, as well as funding. One thing is for sure, this is not going to be an easy year for "Team Satomi."