For the past three years, Kurosu Gen has dominated the national B-League motocross circuit. His riding skills have been unmatched, so his promotion to the A-League, the nation's top tier, came as no surprise. However, this division is controlled by an even greater force than Gen: the Red Army and its leader, Igarashi Shunichi. For the last five years, the Red Army has left the competition behind and secured the championship with ease. Gen is determined to end the Red Army's dynasty and claim first place, but the caliber of motocross riders here is far superior to anything he has encountered before.