Here's a little summary about it not written by me just google crap to lazy to write it in my own words. xD;
After the invasion of Japan by the Brittannian Empire, the country is renamed to Area 11. The young Lelouch, a Brittannian student living in Japan, accidentally gets caught up in a local terrorist attack against Brittannia, reuniting with his childhood friend Suzaku as well as meeting the mysterious girl C.C. Cornered in a life and death situation, Lelouch accepts a power C.C. offers to him, the ability to order anyone to do anything. Harboring a thirst for revenge against the Brittanian Empire for their actions against his family, Lelouch wages war against the Empire. Using his newfound power and tactical ability, Lelouch goes under the alias Zero in attempts to fulfill his childhood vow, to destroy Brittannia!
