January 1, 2496. Earth received an interstellar telegram from the people of the Gray Realm. At the same time, they launched a surprise attack on Earth's major space stations, and the ambitions of the Alliance's defense minister were exposed. He was sent before a military court. Earth's last fig leaf of peace was torn away, leaving it exposed to crisis and turmoil. Young soldiers who had yet to complete their training donned their armor and followed in the footsteps of their seniors, stumbling into the dark and brutal battlefield of the universe.
Theme: Even if the universe will one day become everyone's home, until then, we will fight to the very last moment.