After the Pro-bending Arena closes following Amon's attack, Mako and Bolin are invited to stay in Asami's mansion. While spending time there, Korra begins to suspect that Hiroshi Sato is working for the Equalists. As the Metalbending Police Force investigates the claims, they discover stunning secrets.
With the closure of the Pro-bending Arena, Korra excitedly tells Mako and Bolin that Tenzin has allowed them to stay on Air Temple Island. However, they inform her that Asami has already invited them to live at her father's mansion. When Asami shows up, she and Bolin, the latter pretending to speak as Pabu, convince Korra to visit them at the estate. Korra finally accepts the invitation and leaves the arena.
Korra then arrives at police headquarters where she sees Tahno, miserable on account of the failed attempts to restore his bending. After a short conversation and a promise of taking down Amon, Korra sees Hiroshi Sato conversing with Lin Beifong and Tenzin before leaving the establishment, demanding the Equalists pay for what they had done. Later, she visits the rest of the Fire Ferrets in Asami's house, where Bolin proudly explains of all the perks that come with living in the Sato estate.
After Korra and Asami participate in a Satomobile race, the Avatar goes to the restroom. Following a slight run-in with some make-up powder, she leaves the restroom and overhears Hiroshi talking on the phone of how the investigation of Cabbage Corp has bought them time and how he will be ready to strike soon. Korra quickly leaves the estate with the excuse that she remembered she is supposed to babysit Tenzin's children and goes to Tenzin and Lin, telling them of what she heard. Although quite disbelieving at first, they realize that Hiroshi's hate for benders may be because of the murder of his wife, done by a member of the Agni Kai Triad twelve years ago during a break-in and robbery at the mansion.
As they come to interrogate Hiroshi, Bolin, Mako, and Asami are quite annoyed; however, the businessman gives them permission to search all of Future Industries. This search proves to be unsuccessful, as no Equalist material is found. That all changes, however, when what appears to be a warehouse worker slips a note into Korra's hand, telling her where to meet him under Silk Road Bridge to learn more about Hiroshi's potential ties with Amon. As Lin, Tenzin, and Korra meet him, their contact admits to being an Equalist, now repentant over Amon's desire to create war between benders and non-benders. He reveals that Hiroshi Sato is working for the Equalists, producing equipment for them in a secret underground facility beneath his own estate. The former Equalist also reveals that there are rumors about Sato planning something big involving the Equalists.
Lin and her metalbenders, with Korra and Tenzin alongside them, enter the Sato estate with intentions of finding and eliminating any threat. Under the pressure of losing her job because of Tarrlok's recent speeches criticizing her, Lin uses seismic sense to discover a secret tunnel from Hiroshi's workshop to the secret underground factory. Lin orders Officer Song to stay behind and make sure Bolin, Mako, and Asami do not come down; then she enters, followed by her men, Korra, and Tenzin.
As they come to the bottom, they witness the machines produced by Hiroshi. They are then locked in by a wall made of platinum, something that metalbending cannot control or manipulate. Lin correctly guesses that the informant was nothing more than a setup. Unable to get out, the metalbenders, Lin, Tenzin, and Korra are all forced to face Hiroshi and the Equalists; however, the mecha tanks play their part in giving the Equalists the advantage. In the meantime, Mako tricks Song by purposely "sneezing" a breath of fire as Bolin uses his earthbending to trip the officer. The brothers tie up the man and enter the hidden factory, leaving Asami behind.
All of the benders in the factory are easily defeated by Hiroshi's mecha tanks. Hiroshi then orders the chi blockers to round up their captives to be brought to Amon. As Mako and Bolin enter and try to save an unconscious Korra, Tenzin, and Lin, they are spotted by Hiroshi and the Lieutenant. Mako accuses Hiroshi of sponsoring the Fire Ferrets and supporting the Avatar just to gain their trust. Using an electrified glove, the businessman confirms it and states that it broke his heart watching Asami fall for a "firebending street rat" like Mako, then Asami enters. Seeing her disbelief and shock, Hiroshi asks her for forgiveness and tells her that he is doing this because of the loss of her mother who had been killed in the hands of a firebender. He then offers his daughter a glove and tells her to join him and Amon in making a world a better place, free of benders. As Asami takes up the glove, the Fire Ferrets look up in disbelief and despair. However, to everyone's surprise, Asami stuns her father and the Lieutenant, and helps her friends escape before the Equalists can stop them.
Back on the police airship, Korra tells the two brothers that not only they, but Asami, too, are welcome to come live on Air Temple Island, a proposition which they now gladly accept. At the same time, Lin tells Tenzin that Tarrlok was right in saying that she has failed her duty as chief of the police force, and that she will resign the next morning. When Tenzin tells her not to give up, she replies that she has not given up, and that she is going to look for her men and face Amon "outside the law". Korra then turns to Mako and tells him to go to Asami, knowing that she needs him. As he does so, Asami, confused and hurt, emotionally embraces Mako as the airship slowly approaches the Republic City coastline at night.
When Lin Beifong and her officers are searching Hiroshi Sato's personal workshop, Lin uses her metalbending to remove a large piece of the floor, revealing the secret tunnel. Later in the episode, however, Bolin earthbends part of the floor in order to trip a metalbending officer.
While Asami electrifies the Lieutenant, she also touches him with her other hand, which was bare, yet she is not electrified as well.
In the scene where Korra meets Tahno, a man can be seen on a bench across from Tahno. In the next shot, however, he is gone.
Mako is seen wearing his gloves while packing with Bolin; however, when he waves goodbye to Korra as she leaves, he is not wearing them anymore.
As Korra is leaving with the police to investigate the hidden factory, Mako is seen standing behind Bolin and Asami. When Korra glances back at the trio, Mako is seen standing in front of the two.
When Mako leaves Korra after having a conversation, one of Korra's ears is the same color as her hair.
During the escape, when Tenzin and Lin are still unconscious, Bolin picks up Tenzin; however, when they jump in the small earthbent tunnel, Mako is carrying him.
When everyone is leaving the estate, Asami's turtleneck undershirt is missing the moment that she looks back at her home as the blimp takes off.
The push daggers that came out of Lin Beifong's arms are similar to an Indian weapon known as the katara.
This is the second episode in a row where Ikki, Meelo, and Jinora have not appeared.
When Bolin jumps in the Satos' pool, he exclaims, "Earthbending bomb!", similar to Katara's "Waterbending bomb!" in "The Serpent's Pass".
This is the first time Mako and Bolin are shown to have committed a misdemeanor, by assaulting a police officer.
Like Zuko, Asami chooses to join the Avatar after denouncing her father's cruelty. Coincidentally, the way they both turn against their respective fathers involves lightning: Asami turns against her father using an electrified glove, while Zuko retaliated against his father with lightning redirection.