Set in a world where humanity resides within cities surrounded by enormous walls that protect them from gigantic man-eating humanoids referred to as Titans, the story follows Eren Yeager, who vows to exterminate the Titans after they bring about the destruction of his hometown and the death of his mother. As Eren joins the Scout Regiment, a specialized military branch that ventures outside the walls to fight the Titans, he discovers he possesses the ability to transform into a Titan himself, shifting the tide of the war. As the series progresses, the scope expands from a desperate survival story into a complex geopolitical thriller. Eren and his comrades uncover dark conspiracies regarding the origin of the Titans, the history of their civilization, and the true nature of the world beyond the walls. The narrative evolves into a harrowing exploration of morality, cycles of hatred, and the heavy cost of freedom, forcing characters to make impossible choices that blur the lines between hero and villain.