In the year 798 of the cosmic calendar, at the start of 489 of the imperial calendar, Schftt formally introduces a new strategic proposal. The empire proceeds to install an engine within the fortress known as the "City of Vultures," bringing space-jumping technology into active use. A fierce conflict quietly begins. Prompted by Feisha, the alliance government recalls Yang Wen-li from the front lines to the capital, where he is subjected to various interrogations. Meanwhile, the soldiers of Iserlohn, feeling the absence of their commander Yang Wen-li, encounter a terrifying distortion in space, and a massive sphere appears without warning.