Sur Maria'nın düşüşünün üzerinden beş yıl geçmiştir ve Eren, bir kez daha ansızın ortaya çıkıp Sur Rose'un kapısında bir delik açan Muazzam Dev ile karşı karşıya gelir. Devler şehre akın ederken, yeni mezun olan acemiler kayıpların eksik olmayacağı acımasız bir savaşa çağrılır.

Armin, Devlerin ekibini katletmesinin ardından arkadaşlarının ve müttefiklerinin kaybıyla başa çıkmaya çalışır. Şehrin başka bir yerinde Mikasa birkaç devi alt etmeyi başarır, bu da geçmişine ve Eren'le ilk tanışmasına dair trajik anıları geri getirir.

After the retreat bell sounds, many cadets find themselves without enough fuel to scale the wall back to safety. Mikasa begins to lose hope once she hears of the deaths in Armin's squad, but the appearance of a new type of Titan stokes her will to fight.

Armin comes up with a risky plan that pits Titan against Titan as the abandoned cadets attempt to take back their headquarters. Getting into the building might be possible, but getting out alive and refueled will mean facing more of the giants.

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?

Cadets respond to Eren's terrifying transformation with doubt and fear as he struggles to understand it himself. If Armin can’t talk the commander into using Eren’s newfound powers for the good of humankind, all hope of stopping the Titans might be lost.

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 plan to reclaim Trost falls apart when Eren's newfound powers turn him into a mindless giant. As Titans continue to swarm the city, it's up to Armin and Mikasa to make sure the cadets massacred during the mission haven't died in vain.

Jean takes desperate measures to replace his broken Maneuver Gear. Meanwhile, Eren is able to seal the hole in the wall thanks to the help of his fellow cadets, but the cost of humanity's first victory against the Titans will be enormous.