After Aang, Zuko, Katara, Sokka, Toph and Suki had defeated Firelord Ozai and stopped the tyranny of the Fire Nation, Aang and Zuko took steps to usher in a new age of equality amongst the nations. In the center of the Fire Nation Colonies, they built Republic City, a place where people of all nations can live without fear of war. Now 70 years have passed since then, and Aang's successor, Korra, is training to be the new Avatar. After passing her firebending test, she meets with Tenzin, Aang's son and the only Air Bending Master, who is supposed to be her Air Bending Teacher. However, due to tense circumstances in Republic City, he tells her that her training must wait, so that he can tend to his duties in the City. Not wanting to wait, Korra sneaks out of the South Pole and heads to Republic City where she finds herself in over her head.

Korra searches for inspiration in the Pro Bending arena.

The Fire Ferrets are strapped for cash, as they need to provide funds to enter the upcoming ProBending Tournament. Bolin attempts to help Mako by sourcing some work and ends up in the employ of the Triple Threat Triads. When Mako learns of this, he and Korra attempt to get Bolin out before he gets involved in a gang war. While doing this, they find that Bolin is captured by the Equalists, where he is used in a demonstration to show a terrifying ability that Amon possesses.

Korra is recruited to join Councilman Tarrlok's task force which tries to rid the city of Equalists.

As the ProBending Tournament begins, emotions fly between the members of the Fire Ferrets. While Korra and Mako have feelings for each other, they have issues displaying it due to Asami being involved. Bolin attempts to make a move on Korra, but this causes conflicts between Mako and the young Avatar, for Mako is defensive of his younger brother. Tension ensues, causing the team to have difficulty playing in the ring. Will they manage to pull through the tournament? Or will emotions tear apart their chances of greatness?

The Fire Ferrets are preparing for the big championship ProBending match, when Amon declares a threat to the city that, if the match was to continue, dire consequences would ensue. Korra, Mako and Bolin convince the council to allow the match to happen, with the help of an unsuspecting individual. What will Amon do to the city when the match happens?