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.

The war with the Nightfly O'Notes is not yet over, but having lost their friends, the grieving Akira, Yosuke, and other Scar-red Riders have a difficult time navigating the healing process to get back on their feet.