Korra is entering the next phase in her Avatar training. Meanwhile Mako becomes a police, Bolin continues professional bending and Asami struggles to keep her business afloat. Korra decides she has mastered Air Bending training with Tenzin and decides to move on. The group decided to visit Korra's family at the Southern Water Tribe. While visited the Tribe, they are attacked by a vicious spirit, which Korra's uncle, Unalaq, easily destroys after everyone else failed to even scratch him. Korra decides training with Unalaq would be better for her than Tenzin, and so her new journey begins!
Unalaq, as part of Korra's Avatar training, takes Korra and the group to unlock the Spirit portal. Soon after, Unalaq attacks the Southern Water Tribe and the group knows of his evil plans to take over the tribe. Or do they? Korra and the group set out back to Republic City in order to get help for this new Civil War from the president. Meanwhile, Asami met up with a business man named Varrick who invented "movers" (movies) and claims he can help her bring her company back to the top. There is an attack in Republic City where Mako the cop set out to find the ones responsible. Oh, and Bolin falls in love with Unalaq's daugher, Eska.
Enough to make your head spin?
After being turned down by the president and breaking up with Mako, Korra decided to go seek help from the Fire Nation, where she was swallowed by a gigantic evil spirit. Mako discovered Varrick was the one responsible for the explosion and got thrown in jail after being framed by him, and accusing him of using the explosions to fuel the Water Tribe's Civil War. Meanwhile, Varrick has taken Bolin and turned him into mover star Nuttuk, where they together make movers to convince the president to aid the Southern Water Tribe. Korra gets washed up on the shore of the Fire Nation and loses her memories. She is then taken on a spiritual adventure where she discovers the origins of the Avatar, and the story of the First Avatar, Wan. Wan fused together with the Light Spirit Raava in order to stop Dark Spirit Vaatu, and they locked him under the Tree of Time for 10,000 years. Avatar Wan closed the portals to the Spirit World and forced all Spirits to forever live separate from humans, where only the Avatar can be the bridge between the two worlds.
Whoooo! Lots to take, am I right, or am I right?
After waking up, Korra regains most of her memories and finds out Unalaq's (true?) plans, which were to release Vaatu on the Harmonic Convergence and take control over the world covered in Darkness. After making this realization, she turns back to Tenzin, who is on a family vacation, and tells him everything, where they discover they must close the Spirit Portal before the Convergence. Tenzin attempts to be the Avatar's spirit guide, but ultimately leaves it to his daughter, Jinora. After Jinora and Korra go to the spirit world, Jinora is captured and Korra is forced to open the other Portal. Meanwhile, Bolin starts to become famous, Asami is still struggling, Varrick's plan is working, and Mako is still in jail.
Too much stuff happening in so little time.
As Bolin's Nuttuk finale arrives, he visits Mako is jail, who tells him to watch out for Varrick. Bolin finds out about Varrick's plan and puts a stop to him. PHEW!! Done with that part of the story... ANYWAYSS>>> Korra goes back to Republic City where she tells the president who the true plan of Unalaq, but the president still refuses to help the War. Bolin, Mako, Asami, and Korra, along with Tenzin and his siblings all go back to Southern Water Tribe in order to go close the portal themselves. They make a plan, execute it, and enter the Spirit World. Korra, Bolin, Mako all try to stop Unalaq, who fuses with Vaatu to become the Dark Avatar, and Tenzin, Bumi, and Kya all go on a search for Jinora. After an epic fight, Korra loses and Raava is ultimately destroyed, destroying Korra's Avatar Spirit - and lineage - with her. Korra, with the help of Tenzin discovered that although she lost her Avatar Spirit, she still had her own. She got back into the fight with Unalaq/Vaatu (Unavaatulaq? -- I thought it was funny) and won, destroying Vaatu's spirit for the next 10,000 years, and reviving Raava by finding the "the light inside the darkness." She left the Spirit Portals open saying it was not right for Wan to separate the humans and the spirits, and that they were meant to live together. Happily Ever After.