Following Eren Yeager's devastating actions, his former companions and past adversaries unite to oppose his destruction. Despite their history as bitter enemies, Armin Arlert, Mikasa Ackerman, and the surviving members of the Scout Regiment join forces with Reiner Braun and the remaining Marleyan soldiers. This small, unlikely coalition embarks on a mission to halt Eren's fury and, if possible, rescue their old comrade along the way.
As Eren relentlessly advances regardless of the cost, he wrestles with his own inner conflict. Though deeply regretful of his horrific invasion, he believes his motives are just: Eren sees this path as the sole means of protecting his friends and, more broadly, his people.
The opposing forces hurtle toward an inevitable final confrontation that could cost millions of lives. Even as they face a horde of monsters beyond anything previously imagined, Mikasa, Armin, and their allies stand courageously against certain doom.