Lelouch Lamperouge finds himself caught in a clash between an anti-government terrorist group and the Britannian army. When things take a turn from bad to worse, a mysterious green-haired girl bestows a dangerous power upon him, changing his life forever.

Lelouch teams up with the terrorist group to take down the army as they destroy Shinjuku Ghetto. But when Suzaku is put in control of the army’s newest Knightmare model, will Lelouch’s plan fall apart? Or can he still move the pieces in his favor?

After confronting Prince Clovis, Lelouch learns information about his mother’s murder. Back at school, he is surprised to find one of the terrorists he worked with is a fellow classmate. But when he confronts her, he finds the limits of his new power.

Suzaku is accused of the murder of Prince Clovis, and Lelouch must save him. But to do so could mean revealing himself to the army. With a new alter ego and the help of Kallen and her comrade, they must try to pull off a daring and public rescue.

The mysterious green-haired girl known as C.C. is alive and intent on hanging around Lelouch as he accepted the contract and the Geass Power. Meanwhile, Suzaku is set free and encounters a strange girl who calls herself Euphy.

Suzaku enrolls in Lelouch’s class at Ashford Academy and is avoided by everyone. While Suzaku struggles to fit in at the school, Lelouch loses his Zero mask to…a cat? Milly turns the cat hunt into a game for the student body, much to Lelouch’s dismay.