Japan or Area 11 is occupied by a great power, Britannia Empire. There are two boys living there, Lelouch and Suzaku. Lelouch is trying to obtain the power of Geass to destroy the world. On the other hand, Suzaku operates a nightmare frame ,Lancelot, to seek for ideal and truth of the world. Their contrastive ways of life make a big wave to rock the empire. A new legend of the 21st century is about to begin.