Eren Yeager believes the only way to protect his friends and his people is to continue an advance that threatens millions of lives. He presses on despite his inner turmoil and profound remorse over the horrors of his invasion. Those trying to stop him must confront both his resolve and an overwhelming army of monsters.
Among his opponents are Armin Arlert, Mikasa Ackerman, and the remaining members of the Scout Regiment. They have allied with Reiner Braun and survivors of the Marleyan military, bringing former enemies together against Eren's genocidal rampage. Their small combined force has two aims: halt the devastation and, if they can, save the comrade responsible for it. With a final confrontation approaching, they face a vastly stronger enemy and the possibility of catastrophic loss of life.