Shiganshina es una de las defensas de vanguardia de la humanidad contra su mayor amenaza: los titanes. Aquí Eren Jeager, Mikasa Ackerman y Armin Arlert viven pacíficamente , pero un repentino ataque les muestra la crueldad del mundo.
Después de que los Titanes rompan el muro, los ciudadanos de Shiganshina deben correr por sus vidas. Sin embargo, a aquellos que logran llegar a un lugar seguro les espera una vida difícil.
El método más efectivo para matar Titanes son las conocidas como "Maniobras Tridimensionales", Eren, Mikasa y Armin se instruyen para aprenderla. Durante el entrenamiento comienzan a congeniar con sus compañeros.
Tras tres años de duro entrenamiento, Eren, Mikasa, Armin y los demás están a punto de graduarse. Mientras tanto, Eren se da cuenta de que perfeccionar sus habilidades para matar Titanes es la mejor forma para alejarse de ellos.
Cinco años después de la tragedia de Shiganshina, Eren se enfrenta al Titán Colosal que rompió el Muro María, pero le pierde de vista entre una nube de vapor.
Cornered by the titans and out of gas, the desperation takes over the scouts. After hearing the news about Armin's squad, Mikasa encourages her mates in order to continue fighting at any cost.
Armin comes up with a risky plan that pits Titan against Titan as the abandoned Cadets aim to take back their headquarters. Getting into the building may 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 monster. One question is all that matters: is Eren human or Titan?
Cadets react to Eren's 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 humanity, all hope of stopping the Titans may be lost.
Plans are created to use Eren's Titan powers to seal the hole in the wall to 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 maneuvering device. Meanwhile, Eren is able to plug 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 vast.
A military tribunal will decide Eren's fate. The Military Police call for his execution, while the Scouts argue that he is a powerful resource for humankind. Mikasa is put on the spot when asked about the events of the Trost mission.
The Scouts move Eren to an old, abandoned castle where his training will continue. 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 corps they'll join, but after the tragic events of the Trost attack, many are uncertain which branch to choose.
As the Scout Regiment pushes toward Shiganshina, they encounter an intelligent Titan unlike any they've seen before. When Armin hypothesizes that it's really a human that's been turned into a Titan, he, Jean, and Reiner attempt to stop it.
As the Female Titan tears its way through the Scout Regiment, Levi makes a bold decision to split the ranks and send Eren and the supply wagons through a huge forest.
A memory of Eren testing out his Titan powers sheds light on how his abilities work. As the Female Titan slaughters members of the Scout Regiment, Eren is faced with a difficult decision: does he trust his teammates or act out on his own?
The Female Titan has been captured. Erwin's goal is to find out who the human is lurking inside. Meanwhile, the Scouts realize the reason Levi told no one about their true mission outside the wall is because of a spy among their ranks.
After watching Eren get swallowed by the Female Titan, Mikasa and Levi follow the monster in the hopes that he's still alive inside her. As the Scout Regiment tries to recover from the brutal losses of the operation, emotions run high.
After the failed scouting expedition, Eren and his superiors are summoned to the capital. Annie sees just how deep corruption runs in the Military Police and agrees to join Armin in a plot to defy the government-but nothing is as it seems.
When the identity of the Female Titan is finally revealed, she goes on a rampage within Wall Sina. Eren is hesitant to fight her, but Armin and Mikasa throw themselves into the battle in a desperate attempt to stop the towering monster.
Eren goes head-to-head with the Female Titan in a fight that demolishes Stohess District inside Wall Sina. As the number of casualties multiplies and Annie tries to escape over the wall, Erwin must deal with the consequences of his plan.
