As motor racing evolves into a popular fighting race called IGPX, humanoid high-speed mechs running at 400 mph compete; Team Satomi, the winner of the IG-2, joins the top league, the IG-1.
At the race, the opponent Team Black Egg uses an aggressive defense-only strategy; Takeshi and his teammates encounter difficulty shaking off the tough defense.
The brain of Team Satomi is Amy; she has been called a genius since she was little, but she has a problem she would never tell anyone; Takeshi is walking along the racetrack and meets Team Satomis next opponent.
The final match against Team Velshtein begins; the duel between Takeshi and Cunningham escalates as they advance to a level that never before attained in the history of IGPX; Liz and Amy develop their skills in the battle.