|I... I don't want to fight anymore. I don't want for us to try to kill each other again. Not with any of you... not even with Eren...|
|— Annie Leonhart, after asking if Mikasa Ackerman and the others are willing to kill Eren Yeager|
Eren Yeager recalls the events leading up to the present day: how he pretended to side with his brother Zeke and Yelena, how he shared his true plan with Floch Forster and Historia Reiss, and how he learned that Mikasa Ackerman's devotion to him has nothing to do with being part of the Ackerman clan.
On board the ship, Hange Zoë tries to reason with a distraught Annie Leonhart, who is being held back by Mikasa Ackerman and Jean Kirstein. Hange explains that they have no time to save Liberio, which is why they are heading for Odiha. Annie sags to the floor, disheartened at the thought of losing her father. Without him, she no longer has a reason to fight anymore. Hange tries to convince Annie to continue fighting, saying that Theo Magath understood that Liberio and Marley could not be saved, but he sacrificed himself anyway so that the rest of them could save as many people as possible.
This prompts Annie to circle back to a question which she had asked before: will the Survey Corps be able to kill Eren Yeager and if she tried to kill him, would they be able to sit back and watch. However, shortly afterward, Annie's demeanor weakens as she says that she no longer wants to fight or be prepared kill Mikasa, the rest of the Survey Corps, or Eren for that matter.
Eren wonders which event set him on his current path and quickly decides it does not matter. He recalls his secret meeting with Yelena where she explained Zeke Yeager's plan to euthanize the Subjects of Ymir. Later, he told Floch Forster that he would pretend to follow Zeke's plan, and asked Floch to do the same. However, Eren told Floch that in reality, his real plan was to destroy the rest of the world in order to put an end to the cycle of hatred.
Eren secretly visited Historia Reiss and warned her that the Military Police Brigade was moving forward with the plan to turn her into a Titan and feed Zeke to her once he arrived at Paradis Island, giving her the Beast Titan. Historia was aware but did not see a need to fight or run like Eren suggested. She would go with the most reliable plan to ensure the island's survival and that Eren defending her when the plan first came up was enough for her.
However, that was not enough for Eren. He confided his plan to her, and Historia vehemently objected on the basis that not everyone outside the island is their enemy. People would be killed without any idea why. Eren understood this but said it was the only way to end the cycle of revenge born from hate; by removing all history of that hate in this world. His plan would also end the cycle of children eating their parents to inherit the Power of the Titans, which was what the military would do with her.
Historia felt that she could not live with herself if she did not do everything in her power to stop him. Eren then suggested using the Founding Titan's powers to manipulate her memories if enduring them would be too much for her, but believed she could stay quiet until his plan came to pass because she was the one who saved him back in the underground cavern; the self-described "worst girl in the world." Historia was shocked by this, and then asked Eren what he would think about her having a child.
Eren remembers talking with Zeke in Marley, asking about headaches in the Ackerman clan. Zeke had never heard of any sort of imprinting behavior that causes an Ackerman to protect a host and suspected that Mikasa's affection toward Eren is simply because she likes him very much. He then asked Eren how he planned to say to Mikasa, and Eren replied that there was no point as he would only live for another four years.
Eren recalled the damage he did to his body, which included cutting off his foot with a blunt blade and forcing a bullet into his eye, to pretend to be a gravely wounded soldier. He then thought about his friends and the refugees he had met and said that he would want them to live long, happy lives.
In the present, the Global Allied Fleet makes a stand against the approaching Wall Titans in Port Acrifa. However, their cannons are ineffective, and the Titans can scorch a ship's crew to death by swimming underneath it so that the heat of their bodies turns the water around the ship to steam.
On land, soldiers attempt a similar futile artillery barrage from the harbor before retreating to higher ground. Some of them turn back in fear and see the gargantuan skeletal shape of Eren's modified Attack Titan approaching from behind the line of Wall Titans.
As Eren marches into Marley, he remembers his mother's death and the vow he made that day- to keep pushing forward without stopping until he destroys every last one of his enemies in the world, while the Wall Titans make landfall and begin the destruction of Marley.