The Thunderbolt Sector, formerly referred to as Side 4 "Moore," is the site of a brutal clash between Federation troops and Zeon forces. The area, which comprises of destroyed space colonies, is a dangerous location that emits electrical charges due to the collection of metal debris. Among the Federation soldiers assigned to the region is MS pilot Io Flemming, who finds himself face to face with Zeon sharpshooter Daryl Lorenz on the battlefield.