The story is set in a world where the Holy Britanian Empire has conquered most of the world and any non-Britanians live as second class citizens. The story follows a young man called Lelouch who lives in area 11 (formerly called Japan). He was formerly a Britanian prince but following his mother's death he was exiled and has been forced to live in secret hiding his true identity. He understandably hates the Britanian Empire and longs to oppose them. One day a chance meeting with a strange girl gives him the power of Geass - a power which gives him the ability to issue an absolute command to anyone and it must be obeyed. With this power and his own keen intellect and brilliant tactical mind Lelouch become Zero and starts the order of the black knights to end the Britanian empire and his father once and for all.
This show has some of the best fight scenes and cleverest tactics you will ever see. The main caracter is truly original - neither good nor bad. The supporting cast is also amazing and every single character is well rounded and fully developed. This is a brilliant anime and one of my personal favourites.