After the Ark Fleet's destruction and the decimation of enemy troops, the Knights of St. Michael prepare for a final attack on Castle Weisswolf. The W-0 unit, now joined by the newcomer Ashley Ashra, readies to intercept them. As Shin struggles with his uncontrollable Geass and aims to eliminate his younger brother, Akito, driven by his vow to return to Leila, stands firm against his fate. The siblings engage in a climactic battle to determine their ultimate destinies.