After one hundred years of peace, humanity is suddenly reminded of the terror of being at the Titans' mercy.

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.

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.

A recap of events since the Fall of Shiganshina and the Battle of Trost.

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.

Levi's group joins the Scout Regiment, but they bring with them a hidden agenda. The upcoming expedition beyond the walls seems like the perfect opportunity to carry out their plan.

With a new enemy revealed, Eren and the Scouts fight back using all the techniques at their disposal.

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?

Against a rush of enemies, the Scouts scramble to defend their horses. But despite falling into a trap, they have their own surprise for the Armored Titan.

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.

As Erwin’s heroic charge buys Levi time to confront the Beast Titan, Armin comes up with a plan of his own that lays it all on the line.

While picking up the pieces from the costly battle, tensions rise when deciding which of the wounded Scouts to use the single syringe on.

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.

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