Sequel to Journey to a New Battlefield. It's been two years since the Bloody Valentine War, and tensions are rising. When a shadowy group attacks the colony of Armory One, a certain Gundam pilot must take to the battlefield once again. However, little to his knowledge, some old friends have embarked on a journey to his new world... and their power will rock it to its core.

The war is won, yet he cannot find peace. When a mission gone wrong throws Heero into another world, how will he survive? And how will he react when he is confronted with his greatest challenge yet? For love can be trickier than any battlefield foe...

While investigating an anonymous message, Heero and Duo end up in the Cosmic Era. New mobile suits, new factions, and a whole new war. Now the Gundam pilots must fight and search for those responsible, all while under watch of a mysterious figure.