Avatar: The Legend of Korra - Season 2

Six months after the events of the Anti-bending Revolution, Korra, having learned to bend all four elements and achieved status as a Fully Realized Avatar, must once again become the student when she delves into the realm of spirits under her paternal uncle's teachings and tutelage. Now learning the depths of her spiritual connections, Korra soon discovers that light cannot exist without the dark, and in a never ending cycle of creation and destruction, only she has the ability to maintain balance in the world.