Code geass is about Lelouch, a discarded prince of the kingdom of Britiannia, who is trying to destroy his father who is the Emperor of said kingdom as well as the kingdom itself so he can try to create a better world for his little sister Nunally. In the beginning he meets an immortal woman named C.C, who grants him the Geass, a power that gives Lelouch the ability to make anyone do anything he says without question. He soon uses this power to bring Britianina to its knees.
Overall, this is a pretty cool anime to watch, the major theme of the anime (including the 2nd season) is that, for some people, power is like a drug: The more they get, the more they want, and they'll do anything to maintain their position. If you like death note, you'll definitely like this one.
