Eren begins his training with the Cadet Corps, but questions about his painful past overwhelm him. When he struggles with a maneuvering exercise, Bertolt and Reiner offer kindly advice.

Plans are made to use Eren's Titan powers to seal the hole in the wall in an attempt reclaim Trost. But with the government's bloodstained history and vocal dissenters in the military ranks, the biggest threat to humankind may not be the Titans.

Everyone is a suspect in the investigation to find out who killed the two test-subject Titans. Meanwhile, the cadets pick which military branch they'll be joining, but after the harrowing events in the Trost attack, many are uncertain which branch to choose.

The Female Titan has captured Eren after ripping him out of his Titan body, but Mikasa and Captain Levi give chase. Elsewhere, the Recon Corps begins preparations for the journey back home to the Wall with their numerous dead in tow.

A look into Grisha's memories shows Eren the many secrets his father was hiding, including one which led to his mother's demise.