"Our target is OZ " is the rallying cry of the five young Gundam pilots that fell to earth like meteors. They begin to attack OZ facilities scattered around the globe. Trowa, in the Heavyarms, launches a fierce attack on an MS factory on Corsica, when suddenly the Gundam Sandrock appears, with Quatre in the pilot's seat, leading a Maganac corps. The battle between these two Gundam pilots, who had been unaware of each other's existence until they end up engaged in combat, takes an unexpected turn...