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.

The new IG-1 season opens; the first opponent for the rookies of Team Satomi is Team Sledgemamma, known for its rough play.

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.

River is restless thinking about Team Satomi's match with the champions of Velshtein and his position in the team; Satomi goes to see someone for some crucial parts for her mechs.

River confides in Miss Satomi about quitting the team.