A powerful Nightfly O'Note attack on Ryukyu LAG headquarters leaves the Scar-red Riders in a precarious position. Hijiri begs Epiphone to undergo resonance with him so that he can protect Akira.

The Riders, the Substances, and Akira enjoy themselves while preparing for a Christmas party. Troubled by past memories, Hako suffers an identity crisis. A major conspiracy within the government goes into action.

Akira is taken to Tokyo LAG, where Hako has her own agenda concerning her. Grunbach launches an all-out invasion of the capital of Tokyo. Okazaki, anticipating such an attack, initiates her plan to counter the threat.