The season covers the Marley (chapters 91–106) and War for Paradis (chapters 107–139) arcs from the original manga by Hajime Isayama. The season introduces Gabi Braun and Falco Grice, young Eldian Warrior candidates seeking to inherit Reiner's Armored Titan four years after the failed mission to reclaim the Founding Titan.While Marley plans to invade Paradis to strengthen their weakening military and retrieve the Founding Titan, the Survey Corps lay an attack in their homeland.As Marley and the Paradis forces go to war in Marley and the Shiganshina District, both sides sustain a heavy death toll while Gabi and Falco are forced to confront their internal tensions about the supposed "devils" of Paradis.
In the second part of the season, aware of the global anti-Eldian sentiment resulting from Marleyan propaganda, Eren Jaeger preemptively targets the world outside of Paradis with the Rumbling, unleashing millions of Colossal-like Wall Titans in a widespread effort to kill all life beyond the island.
Watch Episodes of Attack on Titan Season 4