Team Avatar returns! Korra and her friends have rid Republic City of Amon and the Equalists, but now they face an even bigger threat as the Spirit and Human worlds collide! Dark Spirits start to appear and randomly attack humans, and the only one who seems to know how to deal with these enemies is Korra’s uncle, the Chief of the Northern Water Tribe. Korra chooses to follow her uncle to understand more about the Spirit World, but when her father, Chief of the Southern Water Tribe, disagrees with some of his teachings, it spawns an all-out war between the two tribes with Avatar Korra caught in the middle! To stop the world from being permanently overrun by the Dark Spirits, it’s up to Korra and her friends to embark on a journey that takes them deep into the mythology of the mystical Spirit World, encountering creatures like nothing they’ve seen before, and discovering the truth about the very first Avatar!