With the appearance of Titans within Wall Rose, Sasha and Connie ride as messengers to warn their villages of the impending threat.

Unarmed and overwhelmed by the Titan assault on the castle, the only hope for the Scouts may lie in a promise and a secret.

Utgard Castle comes crumbling down as Ymir desperately battles the Titans. Now, Christa must fulfill the promise they made long ago during winter training.

When their group finally flees, Ymir wonders whether she should lie or stay true to herself, even if it means ruining the lives and future of those she cares about.

The battle continues as Eren and the Scouts face many hard decisions. Who is the real enemy? What is the war really about? And what will the future hold for mankind?

While one front in the battle is rained on by flames, the other is battered by boulders. With no way out, the Scouts are forced to fight or die trying.

The Scouts reflect on all they have gained and lost in their mission. With their enemies gone, Eren and the Scouts finally enter the basement to uncover the truth that will change everything.