As Marley battles the Mid-East Alliance to end a four-year war, a group of Warrior candidates on the front lines compete to be the successor of the Armored Titan.

Though glad the war is over, both the Eldian Warriors and Marley brass realize that neither have a future unless they finish the job of retaking the Founding Titan.

Reiner reflects on his past, remembering what pushed him to become a Warrior and keep moving forward when all hope was lost.

Eren's rampage is thwarted by the War Hammer Titan whose tenacity leaves him stumped. With Marley's military joining the fight, he'll be hard-pressed to survive on his own.

As Paradis deals with the aftermath of the raid on Liberio, Armin looks back in the past to meeting the volunteer soldiers who reshaped their world.

Trapped on the world's most dangerous island, Falco and Gabi will do anything to survive. Elsewhere, the public demands answers when they learn the savior of Paradis has been detained.

Gabi and Falco seek out a fellow Marleyan who's surprised to see Warrior candidates. The truth of what happened at Ragako may shed some light on Zeke's secret plans.

Armin and Mikasa speak with Eren, but are astounded by what he says. In the forest, Levi considers feeding the Beast Titan to someone new, but Zeke has other plans in mind.

A look into Zeke's past shows his struggle to become a Warrior. His plans to end the suffering of all Eldians stems from a chance friendship made in his youth.

With the Yeagerists now in charge, Zeke's master plan is revealed. But before it is put in motion, Eren recruits help to flush out any invaders in their midst.

Colt pleads with Zeke to not use his scream and turn Falco into a Titan. All the while, soldiers and Titans clash in battle as Eren struggles to make contact with his brother.

Zeke takes Eren through Grisha's memories to show him how he's been brainwashed. But in doing so, Zeke discovers something about Eren that he never knew.

With no walls left on the island and Shiganshina full of Titans, the Scouts must battle their former comrades. In the midst of it all, Gabi is determined to find and rescue Falco at whatever cost.

The Azumabito's flying boat is guarded by a port full of Jaegerists, but the Scouts are reluctant to kill their former friends. If they wish to avoid bloodshed, they can't afford their plan to go wrong.

Regardless of where it all began, Eren commits to his path of destruction during the Scouts' first visit to the Marleyan mainland, leaving Mikasa to wonder if things could've been different.

As the rumbling advances, the remaining members of the Scout Regiment race against the clock with their Marleyan and Azumabito allies to catch up to Eren and stop the rumbling before the rest of the world is crushed under the Wall Titans' feet.

Eren, as the Founding Titan, advances on Fort Salta with countless other Titans. Appearing before the refugees, who stand on the brink of despair, are Mikasa, Armin, Jean, Conny, Reiner, Pieck, and Levi, who narrowly escaped from the rumbling. The battle between former comrades and childhood friends with Eren concludes here.