Four years have passed since the Survey Corps reached the shoreline and discovered the truth: humanity has not perished, but thrives across the sea in the nation of Marley. The Final Season shifts focus to the perspective of Marleyan "Warriors"—Eldian children like Gabi and Falco who are raised to hate their own kind and compete to inherit the power of the Titans.

As Marley prepares to invade Paradis once more to secure the Founding Titan and restore its fading military dominance, Eren Yeager launches a preemptive strike on Marleyan soil, forcing his former comrades into a global conflict. The lines between hero and villain blur as Eren pursues a terrifying path toward "freedom" that threatens to destroy the entire world. The saga concludes with the "Rumbling," a cataclysmic event that forces enemies to become allies in a final, desperate attempt to save what remains of humanity.