In a world where humanity lives behind massive walls to protect itself from giant man-eating creatures known as Titans, a young boy named Eren Yeager witnesses the destruction of his home and the death of his mother when the outer wall is breached. Fueled by rage and a deep desire for freedom, Eren vows to destroy every Titan and reclaim the world for humanity.

Eren joins the military alongside his childhood friends, Mikasa Ackerman and Armin Arlert, and quickly becomes entangled in a much deeper conspiracy. He discovers he can transform into a Titan himself — a power that becomes key to humanity's fight for survival. Over time, Eren uncovers the truth: the Titans are not monsters, but people like him, victims of a long-standing war between nations.

As the veil lifts, Eren's mission changes. What began as a desire for revenge evolves into a crusade to break the cycle of hatred. But in doing so, he chooses a dark path — activating a global catastrophe called The Rumbling to force the world into peace through destruction. Once a symbol of hope, Eren becomes humanity's greatest threat.

In the end, it is his closest friends who must stop him. Though they once fought by his side, they now stand against him to preserve what remains of the world. Eren’s story is one of tragedy, freedom, and sacrifice — a boy who sought to change the world, no matter the cost.