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.

Two years pass and the time for the recruits' graduation approaches. Annie proves her skill in a sparring session, Jean dreams of serving alongside the King, and graduation day brings shocking revelations — along with the sudden appearance of an old foe.

A miraculous return is met with anger and fear. Cannons are fixed on Eren as he struggles to remember what happened to him inside the belly of a Titan and how he ended up as humankind's enemy. One question is all that matters: is Eren human or Titan?

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.

The Recon Corps moves Eren to an old abandoned castle where he will continue his training. Hange visits and reveals that she's been putting two captured Titans through a series of tests and trials — experiments that she wants Eren's help with.

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.