The background of the story is about the other Geass users who will go to Area 11 to stop other Geass users, one of them is named Alice who is a Junior of Ashford Academy and is "Protecting" Nunnally from all the other students from borthering her because she is disabled. Nunnally is confronted by one of the Generals from the Imperial Army and asks Nunnally if she can do anything to help the Imperial Army. Mily is held captive while Nunnally has to either Agree or Disagree with the General to set her free and the others who are held hostage.
Then the books goes past that one scene and talks about a new character that is some what a "Clone" of Nunnally herself but that she has the Geass power and is able to do what ever to help others out.
The book is pretty good and jumps around from different times with Lelouch not mentioned alot in the book, thats good to see Nunnally having her own Storyline with a few new characters involved with the new story. Hopefully Code Geass R3 will metion these characters from this graphic novel ;D.
This book would appeal towards others who read the main series and interested in the side story of the protagonist's sister "Nunnally". I would recommend people to read this book if you loved the series and just can't enough of Code Geass.
eBook Code Geass (Code Geass: Nightmare of Nunnally, #1)