It's been three years since Zaheer poisoned Korra and the members of Team Avatar have moved on with their lives; Kai and Opal help a struggling Earth Kingdom town.

Korra's three-year journey of healing takes her to unexpected places.

Prince Wu's big day is ruined by Kuvira; Korra thinks she may have found the key to a full recovery.

While the young airbenders look far and wide for Korra, Ikki is briefly captured by two Earth Empire soldiers. Based on what they say, Ikki leads the trio to the swamp. There, Korra is still haunted by visions of being hurt by her past enemies, but manages to connect to the siblings through the great banyan-grove tree's roots. After they beg her to resume her Avatar duties to face Kuvira, Toph's advice helps Korra to let go of her fears, bend the rest of the poison out of herself and re-enter the Avatar State.

Kuvira threatens Zaofu; Bolin is caught in the middle of the bad blood between Su Beifong and Kuvira.

Korra returns to her role as the Avatar, but is she really ready for action? Bolin and Varrick break from Kuvira's army.

In a clip show episode, Mako, Korra, and Bolin recollect their past. Mako tells Wu about his romantic entanglements and eventual breakup with Asami and Korra. Korra talks to Asami about her confrontations with Amon, Unalaq, Vaatu, and Zaheer. Varrick presents Bolin's life to the Earth Empire refugees in the style of an action film in which Bolin defeats all of Korra's previous enemies.

The spirit vines in Republic City start abducting people and it's up to Korra to figure out why.

Bolin helps Opal and Lin save the Beifongs from Kuvira. Korra visits the Spirit World looking for help.

Korra and Team Avatar try to stop Kuvira from moving against Republic City; Kuvira unveils a deadly new weapon.

Team Avatar clashes with Kuvira on the streets of Republic City; Pema and Prince Wu help evacuate innocent citizens.

The fate of the Earth Kingdom and the Avatar's life is at stake, when Korra comes face to face with Kuvira.