My Opinion: Code Geass is one of my all time favorite anime. The storyline is amazing and always keeps you wanting more. 10/10
Summary: Set in an alternate future, the series focus on how the former prince Lelouch Lamperouge obtains a power known as Geass and decides to use it to destroy the Holy Britannian Empire, an imperial monarchy and a superpower that has been conquering various countries.
Episode 1
http://www.animefreak.tv/anime-watch/code-geass-lelouch-rebellion-episode-1