Eren Yeager and others of the 104th Training Corps have just begun to become full members of the Survey Corps. As they ready themselves to face the Titans once again, their preparations are interrupted by the invasion of Wall Rose—but all is not as it seems as more mysteries are unraveled. As the Survey Corps races to save the wall, they uncover more about the invading Titans and the dark secrets of their own members.
Coupled with the military's cover-up of a previous incident, the shocking discovery inside the Walls causes a stir. Elsewhere, while the new Scout recruits are held for observation, a surprising threat appears.
With the appearance of Titans within Wall Rose, Sasha and Connie ride as messengers to warn their villages of the impending threat.
The Scouts search for a hole in the wall while Eren and the others learn that someone close may be hiding all the answers.
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.
Following the battle, the Scouts regroup atop the wall only to find more questions than answers.
With a new enemy revealed, Eren and the Scouts fight back using all the techniques at their disposal.
Without a way to pursue the Titans, the Scouts have no choice but to recuperate as they wait for reinforcements. But do they still have faith in Eren?
The Scouts rally and charge in pursuit, but Reiner is not quite himself while the group is trapped in the giant forest until nightfall.
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 pursuit begins as the Recon Corps battles their way to Eren. But as the Scouts start to take numerous casualties, Erwin executes a risky strategy.