One year has passed since the day of "Black Rebellion", the Japanese insurgency, which was lead by "Black Knights".
The battleground, Tokyo settlement, isfinally beginning to revive.
Lelouch Rampeluge, who attends Ashford institute, feels some sort of empty coldness among the returning calmness, while being pushed around by Viretta, a physical education instructor.One day, in the search of excitement, Lelouch goes to a gambling, a chess tournament, at the Babel tower with his younger brother Roro.
In the sky above Babel tower, an airship is approaching.
It is the beginning of a decisive operation by the survivors of Black Knights, lead by Urabe and C.C.